It used to be that software drove many improvements in PC hardware. The need to render higher resolution images in real time pushed the entire computation chain for speed and memory capacity.
Now that software (basically: game) development on the PC platform has been stagnant for quite some time, hardware developers have focused their efforts elsewhere. I'd do the same.
Maybe when there's a real financial incentive to develop beyond-the-cutting-edge game software, there'll be a need for more powerful platforms.
I had always hoped that the improvements would come as better Artificial Intelligence and game design. The AI would finally start to require more CPU power. Unfortunately, there's been barely any progress whatsoever in the past 10 years, and improvements here don't even seem to be on game developers' radar.
As far as PC hardware, I'm in the same boat as you guys. System was built in 2011, and aside from GPU upgrades, I don't even see myself upgrading 2 years from now unless something changes. My money will probably be spent on a new G-Sync monitor like the Asus ROG PG278Q
and probably a GTX770 or whatever they call the lower-high end big Maxwell chip.