Ok, here’s a controversial question:
Is there actually a difference between 60hz and 120hz?
comments
yes it's double the amount of Hz (double the amount of potentially displayable frames per second)
Yes. Competitively, imagine a scenario like this: an enemy is crossing a doorway in front of you, and that takes a tenth of a second. On 60hz, that gives you six frames to react. On 120hz, it gives you double that, 12 frames. Even though it's the same amount of time, a higher frame rate does indeed have an effect. (this can be seen a lot on 30 to 60hz as well. Usually players get better on higher frame rates.)
This just means games are pay 2 win, if better hard ware gives you an advantage
mostly no, but maybe in games that require extreme reaction times such as first person shooter or rhythm games
I agree that most of the time it’s pretty unneeded/unnoticeable though
Yeah, I agree with you, a lot of geometry dash players have like a 360hz monitor to make it easier for them 
also VR requires high frame rates to avoid giving the user motion sickness