Won't cut it for what games?
I haven't run into any issues on my 3770k and 970 SLI setup yet. I could always use a bump in graphical settings, but that would widen the gap of leaning more on the GPU. (Super sampling, AA, etc)
TONS of games won't run at 90 fps on a 4690.
You'd seriously be surprised how demanding some games are for the cpu:
fallout 4 : boston
dark souls 3 (had to overlock to 4.4 ghz or dips below 60 would sometimes happen)
mgs5 : yes , metal gear solid 5! , the lighting and LOD settings put a huge load on the cpu and in several of the camps I easily dropped below 60 fps before overclocking, 90 fps it out of reach for mgs5 if the framerate was unlocked.
gta5 : go to the countryside and watch your cpu shit the bed
We really need better cpus, sadly intel have done nothing but 5-10 percent incremental improvements since 2011.