Once upon a time QUAKE shipped out at 320x240 for most of us........after we all bought our first generation GPU's and added them to our systems, we could play at 512x384 or even in some cases the mighty 640x480. Then you could play quake at 1024x768 or higher. What did you get?
YOu got the same low rez textures and the same architecture, just rendered higher. Higher resolution doesn't really make things look better, it just makes things look sharper....in fact in some cases it makes things look unnaturally sharp, which is why games have taken to using exotic filtering and post-processing to create the natural blur of peripheral vision.
I can get the idea behind having triple screen gaming, racing sims..I suppose even FPS's to a certain extent, but do I need the actual resolution of my display to be even higher than it is now? Not necessarily. I run a big 37" 1080p display. Many folks run higher resolutions in smaller monitors, and there are times in a game when even with AA turned on I will go "This game would look better at a higher resolution, or on a smaller screen"....but those moments are rare and I almost never find myself going "DAMN this game would look so much better if it was running under double the pixels!". I mean unless the game is natively made to run at those super high resolutions, you're just scaling up lower rez textures and geometry.
Ask yourself what are you getting.....besides significantly reduced frame rates.....if you are doing multi monitor, with each monitor serving a purpose (essentially peripheral vision), I get it. To have a single monitor running at 4K in front of you....no, and I don't think we will be there anytime soon. Maybe Angry BIrds 4K, but Grand Theft Auto 4K? I'd rather see more emphasis placed on post-processing and other filtration effects, that to me matters more than doubling the dots on screen, which are already so small you can't pick them out without being up close and personal with the screen, far closer than you will ever be in day to day usage.
ITs like "SCREENSHOT Syndrome". I looked at the back of my old Playstation TWISTED METAL case recently, its amazing how good that game looks when you show the renders in a 2" window
ANyone who played it on anything more than a 19" set however remembered it looked like blocky, texture-warping ASS.
As with all things electronic, its best to avoid anything First or Second generation........hopefully Developers won't be distracted by additional pixels and start to devote their energies to pushing pixels instead of creating more and more believable and fantastic worlds.