What I hear you lamenting the most, Brian, is the "cinematic approach" and more to the point, the fact that most young people have more experience with movies than with literature. I feel confident saying that most young people today know the ins and outs of cinematic story telling long before they are taught to read, so it comes out in the writing they do later in life.
Now this cant be a really new development, certanly it has been sped along with the advent of home movies and home theater set ups, but I remember when I was a very young girl (and that seems quite a whlie ago to me now) that my literature loving family members were lamenting a very similar thing; people not wanting to read the book, stating they would 'just wait for the movie.'
Rather than blaming the POV used, or any other outward extension of the root problem, lets look at the social changes that have led to, and will stem from the wide distribution of Sitcom Programed People.
now tell yourself honestly, how many people do you know who expect there to be a laugh track on queue for them? how many people do you know who feel hard done by if the thing they need most doesn't appear at a plot development appropriate moment? or who are allways trying to brake down a non-existent 4th wall in their real life?
The other social changer I would suggest we keep an eye on are these social media pages like myspace, facebook, and G+. Places where one can simply upload one's life. It eliminates a key part of communication, granted an often annoying part, but key none the less. As social creatures we need to do some Telling in our lives, a kind of sharing where we tell someone else how our life is from our perspective, a someone who will reciprocate by ether sharing how they feel about our perspective, or how they feel about their perspective, or ague that our perspective is wrong, or let us know that we are boring or in some other way unacceptable by not listening and/ or walking away altogether.
Now we can do our telling without having the check of someone "listening" while we do it. Got something to say? post it, tweet it, text it... but face to face conversations are slowly becoming archaic.
And I think that's sad. It takes the human element out of conversations, or at least a part of it.
I think that 3rd person omniscient is more about getting out of one's own head than about cinematic scope. 1st person is more personal in the telling, and if written well more personal in the reading. Personally I find it easier to slip into a Sweeping Epic Telling from 1st rather than any other perspective because then I can throw all my personal emotive weight behind the statements given. For example I once gave an account of my day in Sweeping Epic form, and it consisted of doing the laundry and cleaning the kitchen. The only way I could have pulled that off is with the drama of personal perspective and accounting.
Any form of writing will be susceptible to bad writing as well as good. Let's not condemn the flour for being made into glue when what we wanted was good wholesome bread.