Which books , stories, Graphic Novels, Tv Shows and Games will the world of tomorrow come closest to being like and why?
Well, with the state of the world today... Any post-apocalyptic book.
And at what point does a fictional vision of the future become obsolete?
Well, in one sense it's as
@Parson says: once the posited vision is no longer possible. And yet, in another sense that isn't necessarily the case (prevaricate much?
). What I mean is... it's still possible to enjoy great fiction in worlds or settings that aren't possible. For example, Edgar Rice Burroughs'
Carson of Venus books took place on a world with a) a human-breathable atmosphere, and b) a solid planetary surface. At the time it might have been thought possible - but I think now science has proved this simply isn't correct. So, in theory that vision of the world* in those books is obsolete, but even though I know that I still love those books. Granted, for some (possibly many) people this may mean they never pick up those books or put them down once they encounter those misconceptions, but some people will still enjoy them.
* I'm not sure it was strictly a vision of the "world of tomorrow" at the time it was written (like the
Mars series it may have been set earlier than the author's own era) but some of the setting was, I think, based on the prevailing scientific beliefs of the time (i.e. Venus had a solid outer crust) so it's kind of on-topic, right?