If you make absolutes like that, then everything I could respond with is automatically “wrong”, so that’s not a great conversation opener.
My smartphone is not a gaming monitor either, but 120Hz is hugely noticeable. My windows desktop is using a 144Hz monitor. I had a 120Hz MacBook Pro for awhile. I’m familiar with how I experience high refresh rate on different types of devices.
You may not care, and that’s fine, but what’s the point of asking why I care and then telling me in no certain terms that I won’t? And how do you know if I would be gaming on this or not? Valve has put immense effort into making Linux viable for gaming. If you’re instead trying to say the monitor’s response times suck, how do you know that already?
Mouse and scrolling feels so much more smoother on a high refresh rate monitor. To the point if windows messed up the refresh rate, you can instantly feel it.
For mousing, I can see it but I don't care. I even used my main screen at 30Hz for a while, and mousing was fine.
For scrolling, I scroll at the click rate of my mouse wheel, which is usually 6-20. With no smoothing applied, because I don't want it, scrolling looks the same on both screens.
It's really only games where I care.
So don't be so sure about how universal your own preferences are.
Then you are still able to know the difference since then.
You just don't care about it in that use case. (Neither do I. My second monitor is 60fps, and watching video or developing web page on it are totally fine to me)
The argument `people won't be able to tell the difference about 60fps and 120fps` only makes sense if you don't have experience about using a high refresh rate monitor.
So then I replaced a PC monitor from 60Hz LCD to 144Hz 4K LCD, I expected such difference before buy. After setup, I can find difference but don't find much difference like smartphone. I don't scroll so much on bigger screen PC, and maybe I'm too used to Windows' crappy scrolling. Anyway my mouse has classic wheel so non-smooth scroll is fine unlike touchscreen/trackpad case. Mouse cursor isn't smooth but it's just that. Finally I bought second 60Hz 4K LCD after that because it's cheaper, it's fine.
