I don't think that is the entire problem. PC hardware plateaued with the GTX 1080. It runs at 30fps on the PS4 Pro, so you need a GPU 4x faster than the PS4 Pro's RX 580 equivalent to get 120fps. That happened last gen. The Xbox 360 is about a Radeon 2900XT. You got 4x the speed by the time the Radeon 5870 (or GTX 560 Ti) was out the door just 3 years later. The PS4 is about a Radeon 7870. 4x that is a 1080 Ti (just 4 years later, I loved 2017, best year ever for gaming even if it was expensive). But 4x the RX 580? Not happened yet. The 2080 Ti is about 2.5x the speed. To get 4x the speed we need another 60 percent as I said. If the 3080 Ti isn't 60 percent faster (which is unlikely) we'll be waiting another 2 more years to get 4x the PS4 Pro and get our games back to 120fps.
3, 4, then 6 years to beat consoles decisively?