I think everybody else has more or less answered S.Gal83's question, or at least the question they meant to ask.
But, I've been pondering the question of POVs in more general sense and I'd like to share some of my thoughts... I think the point of Theon, from a narrative perspective is that he served as way to introduce the Iron Borne, who, it seems pretty clear are going to have a large role to play in events going forward. Theon's eyes gave us a way to see them through a relatively familiar character...
****And rereading this all I see that I've got spoilers all over the place, so if you haven't finished AFFC and haven't been paying attention to the spoiler chapters and various leaked info regarding ADWD you should probably back away slowly at this point. AHEAD THERE BE SPOILERS****
One of the things I found off putting about AFFC was the proliferation of POV characters, specifically the introduction of characters who we meet for the first time from their own point of view. There was something really elegant about the structure Martin had set up, adding two (I'm ignoring characters from prologues and epilogues, who have not, as a rule, experienced a very good survival rate) POVs with each book (and, with the exception of Davos, characters who we already knew pretty well), it made each of them special some way, and when we saw through, for instance, Jaime's eye's it was a revelation. Then in book 4 we're given a whopping 8 new POV characters (Cersei, Aeron, Areo, Brienne, Asha Arys, Victarion, and Arianne), only two of whom (Cersei and Brienne) who have really been prominently involved in the action thus far. It was like a completely new series...
Martin has said that he wanted to tell the story with only the original eight POVs but found that idea too limiting. That makes a lot of sense, the scope of the series has increased and to maintain the first person idea you need a lot of different characters in a lot of different places to show the readers everything that's going on, it's an interesting technical challenge, a lot of balls to for George to keep in the air all at once...
but all of this got me thinking about the POV structure of the series as a whole and if understanding it better might give us some clues as to what we should expect going in books to come.
For starters I think it's safe to assume that Dorne and The Iron Borne will have a much larger role to play in the series going forward, fully six of the new POVs in AFFC covered those two locales. That Quentyn Martell has been confirmed as a new POV for ADWD only drives home the point that Sunspear will have a large role to play going forward. In the space of one book we've gone from one semi viable character (Theon) to cover Dorne and The Iron Islands to five...
So if we break the world into pieces where we can expect action to go down this would appear to be the state of play (I think Martin has said that he doesn't want to add any POVs after ADWD, so I'm assuming that's true). I'm paying particular attention to locales where we have multiple POVs, where POVs might cross paths as those are places where I think we can expect to see major deaths both because what characters will be seeing could become redundant and because :
Kings Landing
Cersei is our lone agent on the ground and since I don't figure Jaime will be coming back any time soon, she figures to remain that way. I made this comment in another thread but I'll repeat myself here, I think Cersei actually fairly safe for a while... No one has died thus far in their own POV and it doesn't look like there's going to be anyone to witness the queen's demise for a while. I wonder if that actually argues for Jaime being the valonqar, not only would that golden hand wrapped around her pale throat make for a lovely image, it seems hard to imagine too many people being around to witness the former queen being strangled, which obviously limit the number of people who can see the event for us. It seems Kings Landing will be shrinking in importance heading forward (I mean, aside from the fact we'll be leaving it behind in ADWD), after being the focus of as many as four POVs at one time, the city is down to one. That fits with everything else we know, it should looks like our attention will be shifting North.
The Riverlands
Pretty much a smoking ruin at this point, I think there are only two POV characters in the Riverlands at the moment and neither seems all the likely to stay long. Jaime's work is done at Riverrun but I very much doubt he'll be in any hurry to get back to Kings Landing, though it's not really clear where he'd want to head next? Try to track down Sansa on his own? Try to break up this band of outlaws who've been hanging Freys (after all, he made his reputation against another bunch of bandits)? Hunting the Black Fish? That last seems unlikely, as he's really committed to keeping his vow not to take up arms against the Starks or Tullys (that vow is going to cause him some trouble down the line at some point, I think he's going to refuse to kill someone and Cersei is going to be very very angry). Brienne seems a safe bet to doggedly keep after Sansa unless UnCat makes her swear to go hunt down The Kingslayer instead. Either way, I don't expect either of these two to stay where they are for long...
Dorne
Suddenly the home to no less then three POVs in AFFC (with another Martell-centric POV being added in ADWD) Dorne would appear to be pretty important as we move forward (it's also, I think, the one place where it's hard to see how we could have gotten a POV there from the original 8 characters, the only ones Martin originally wanted to tell the story with... perhaps Tryrion could have been manuevered there, but that's the only person I can see there). While Arys didn't survive, we still have Areo and Arianne keeping us abreast of events in Sunspear. Areo is the new POV I think I would most like to see go away, he's passive, seemingly there simply to be a pair of eyes for us to see through, and largely redundant with Arianne it seems like we should be in posistion to trim an excess of characters in this realm. I hope it'll be him to go. Regardless, Dorne seems like powder keg and with Dany ascending they're going to vital to the story going forward.
Old Town/The Citadel
Sam's our only set of eyes on the ground here, providing us with a window into whatever long con the maesters are running and it seems unlikely that he'll be crossing paths with anybody else until he heads back to wall. I think the main narrative purpose of having Sam there is to give the reader eyes on the ground at The Citadel, though it's not that unlikely that he'll find some vital piece of information for John while he's there.
The Vale/Petyr
Sansa's the only POV we've got giving us a view of the forever underestimated Little Finger. She's finally shown some signs of growing into somebody who can do something other get her father killed (certainly a welcome development), we shouldn't forget that, for the moment, her most useful function is giving us eyes on one of the three or four major players in Westeros. At some point she'll cross paths with somebody, likely Brienne or, possibly, Jaime but it may yet be some time before we see that.
The Iron Born
Another place where we're suddenly overwhelmed with different eyes with which to see. I think we're very likely to see some deaths in this group. Victarion is off to Meereen (along with just about everyone else in the damn world), Aeron is running around trying to drum up trouble for the crow's eye with Asha also on the run from her brother. There just seems to be too much opportunity for these folks cross paths with one another with everyone wanting everyone else dead for everybody to get out clean. I'm not sure who I'd put my money bite it, but I'd be shocked if Balon Greyjoy weren't short a few more kids by the end of ADWD.
The North
Theon/Reek will give us a look at how the Bolton's try to assert their hold as Wardens of North. Davos wil serve as a sort of free agent as given responsibilities (securing support for Stannis) and his former profession (smuggler) he can plausibly appear in any number of places up and down the coast, giving a set of eyes wherever the story demands a pair. I suspect reports of his death are greatly exaggerated for any number of reasons, not least that it'd be pretty sloppy story tell to spoil a major death off screen. Asha's also at Deepwood Motte, trying to find Theon somehow. It seems likely that we'll see at least some of these paths crossing (and maybe with Aeron as well) and, as I've mentioned, I imagine somebody out of this group is going to die. Perhaps a redemptive death for Theon? Has anyone gotten that sort of thing in this series? I guess it's not really the kind of story Martin's telling...
The Wall and Points North
John's been looking north for us for most of the series now, he's the only major character who really seems to have a handle on the real threat facing Westeros and I think just about all of us expect him to have a major role in events going forward. Know he'll also be our eyes on Stannis as long as Davos out drumming up support for his king. Bran's even further north and doesn't seem at all likely that he'll be crossing paths with any of our other POV characters. It does seem likely, however, that his training with Cold Hands and The Three Eyed Crow will provide Martin a chance to do some info dumping. There's stil a ton of stuff we don't know about The Others and it looks like Bran will be in a unique position to start the learning process. Also in this locale will be The Red Woman, Melisandre who'll be one of the new POVs in this book... we don't know how many chapters we'll get from her, but it sure seems to me that she might be one of those characters who just knows too much to stick around long (hat tip to Boaz for noticing that bit of narrative slight of hand), I kind of expect her to be the epilogue POV, watching in horror as everything goes to hell around her and she realizes that she was wrong about Stannis all along. I just can't really see how we get much through her eyes without learning more then we're probably supposed to.
Braavos
Just Arya here and, while I expect she'll be a major player going forward,it's hard to see how she's going to cross paths with anyone else (there's no chance the kindly man sends her off to Meereen right?) until she gets back to Westeros.
Meereen
This seems to be where everyone is headed now, it may as well be the center of the universe. Dany's already there, Tryion is on his way as are Quentyn Martell and Victarion. It's interesting to note that this will be our first chance to see Dany through the eyes of anyone else. Boaz pointed out that pretty much no one has emerged from their own point of view with a heroic image intact and while I'd argue that John comes off better then he's given credit for, Ned worse, I think it will be interesting to see how Dany survives the prism of other characters eyes. Obviously we're in prime position to see some major character die here with so many people in one place, everybody wants a piece of Dany...
And, I think that's everybody. This has gotten kind of unwieldy, and most of what I've pointed out is kind of self evident, but I really think there is something to be teased out here. I think the basic structure of the story must necessarily give away some information about its shape. We just have to work it out.
Going through this, I wonder if there's some value in looking at POV characters who are important for what they do and those who are important for what they see. Someone like Dany can do just about any damn thing she wants, the story appears to be shaping up with her at the center. But characters like Davos or Areo Hotah are vaulable for George because they witness events we need to see. From their very existence we can infer that they'll be a window into something important.