Highely unlikley since dev still can make any games in 1080p without upscaling them.

Ummm... can a human eye even register that?

Yes thats another point I am curios about.

I'm going to say no, there is just no need for it yet. Have a look at this chart, it's worth while.

http://s3.carltonbale.com/resolution_chart.html

It doesn't address 2160p directly but you can extrapolate.

hell no

no all games will likely be 1080p 30-60fps .

As for your questions about the human eye:

EDIT: Someone beat me to it.

there'd be no point to it yet for gaming, for PCs, probably, depending on what your are working with and how many monitors you have. People are already bench marking PC games at 2560x1600 after all, not too far to one step higher.

At the moment, developers need to focus on better graphics for the next generation rather than resolution. TV's will get that when technology gets better.

Lol...giving that high of a resolution to a gmae like Call of Duty 4 is like putting 1000 horsepower on a whats a stock Chevy Camaro.

Completely pointless...but hella cool.