I'm going to wait for PCI Express 4 at the very least, and possibly PCI Express 5 and DDR5 before I upgrade. I will say things are getting exciting, after what seems like years of stagnation. With AMD finally providing some competition, and the next iterations of PCI Express and DDR on the way, we have 8 core mainstream processors right around the corner, video card technology (Nvidia Volta) that is finally making big leaps that will allow 4K gaming to be done smoothly and advance graphics capabilities by larger margins so we can finally get some games that really blow away Crysis, assuming developers bother.. it seems like kids these days like my nephews are perfectly content with the graphics of games like minecraft, showing me how "great" the game looks. lol I agree gameplay trumps graphics but it would be nice to have both. I wouldn't mind some decent story based shooters again like Half Life 2, Bioshock, and FEAR.
Right now I'm rocking a 2600K @ 4.5 and see no reason to upgrade yet, though I admit I'm getting tempted. I'll at least wait for PCI Express 4, and maybe just upgrade the video card from my 970 to a 2080 next year.. we'll see where the tech is at that point.
I just upgraded my TV to an LG 65 inch OLED and threw in a new receiver and 4 ceiling speakers for a 5.1.4 setup, so a new computer build I am itching for I will admit. Hopefully more games support atmos or DTS-X in the future.