Hahaha. Well with some people saying 1080p + HDR looks better than 1440p without HDR it's got me curious. I'm sick of spending $400+ on graphics cards nearly every year. Some of it was me buying a new card that I didn't need, but I don't see the price trends reversing...ever. AMD has perhaps permanently fallen behind Nvidia's release cadence, especially at the higher end. 225mm2 chips generally just don't cut it at 1440p resolution at the start of their product life, if at all.
I love the pixel density. I think that it's still worth it to buy the fastest TI chip at release and sell your old Nvidia chip. Same with AMD to a lesser extent, and a different strategy may need to be employed. Combined with mining and other techniques, it's not too expensive to keep the top of the line GPU.
4K is good just for pure MONITOR use. The 32 inch fills my tiny desk completely, but the real estate I have for doing things is amazing. People ALWAYS resist technological improvements. 4K is better in every aspect. It was only $380 for my QNIX monitor, so I figured if it sucked.... I've spent far more money on extravagantly useless things.
I can't speak to the 1440p vs 1080p. But 4K is definitely a big enough jump to be happy. With the koreans undercutting the global market heavily, it's a GREAT time to try a 4K monitor.
I don't think prices can rise forever. They will rise at the high end until we figure out what the real price demand is for a high end GPU which still we realize is higher and higher at launch than we first though.
But the value will soon need to be there vs the consoles, or the consoles will start to swing people back if GPU prices rise overall.
ALSO, look at something like the 470 crossfire right now. That's arguable the most POTENTIAL gpu horsepower per dollar you can get. If high end prices keep rising, BOTH vendors will need to cut multicard configs, or people will simply enjoy their multicard configuration as it's still far cheaper than the high end rig they'll never afford.
Edit:
Also when people say you can't notice the difference...
Again this is why I love China/Korea. I can buy something at 1/3 price or whatever and just test for myself. Do I need a surfacebook? I'll buy the knock off from China and see how much I use it. Not much.... I guess I don't need a surface.
Still a 4K monitor is just nice for the eye candy games even, a cheap one being available is a nice option.