I can't imagine the cable companies ever getting to REAL 4k delivery when they can't even handle HD. And even if 4k content is on the net, what is going to happen to all the data caps like with Comcast broadband?
Add to that when you have a bigger TV, and sit 10 feet from it, the average person isn't going to be able to tell the difference. At a certain distance, your eye won't register a major difference. Up close it will look better.....on other devices....and people who are sensitive to color levels etc.
I myself am pretty sensitive to picture quality, but I'll mention something and no one else sees it or even gets what I'm talking about...a color level or a slight sync issue etc.
I wonder if there is going to be a market for 4k discs and players, or is that going to be such a minor slice of the market that it won't take off or they won't even bother to try. Only the hardcore would be into it I guess as everything is about streaming and downloading.