I've made a test for myself. Screen split into two parts, two small squares moving and bouncing. First square moves every frame, second square skips every second frame, but moves 2x. So basically one half of the screen is full FPS, another half of the screen is half FPS. And I implemented it as a "blind test", so I could make a guess and then check it.
For screen with 60 FPS, the difference between 30 FPS and 60 FPS was pretty obvious and I could guess it 100% of the time.
For screen with 144FPS, the difference between 72FPS and 144FPS was not obvious at all and I couldn't reliably guess it at all. I also checked it with a few other persons, and they all failed this simple test.
So now I'm holding firm opinion, that these high-FPS displays are marketing gimmick.
https://pastebin.com/raw/hwR62Yhi here's HTML, save it and open. left click reveals which half is "fast" (full FPS) or "slow" (half FPS), scroll changes speed, F5 generates new test.
For screen with 60 FPS, the difference between 30 FPS and 60 FPS was pretty obvious and I could guess it 100% of the time.
For screen with 144FPS, the difference between 72FPS and 144FPS was not obvious at all and I couldn't reliably guess it at all. I also checked it with a few other persons, and they all failed this simple test.
So now I'm holding firm opinion, that these high-FPS displays are marketing gimmick.
https://pastebin.com/raw/hwR62Yhi here's HTML, save it and open. left click reveals which half is "fast" (full FPS) or "slow" (half FPS), scroll changes speed, F5 generates new test.