It would be a massive update as volta (1180 or whatever it is called) is rumored to be roughly at 17 TFLOPS+, i play at 4k so its normal to see FPS dip in 50s or even 40s at max quality in few games (shadow of war average around 55).Next Big thing for World and Next big Upgrade for you
Not Sure, how big it would be, as 1080Ti is already massive.