system
A chat on subreddit /r/pcmasterrace
human
It's the same difference between 1440p and 4k. Just like back in the day there was the same debate about why 1080p wasn't necessary because 720p was good enough.

Higher resolution is always better. Higher framerate is always better. People just haven't admitted that the future inevitably moves to both.

I'd imagine there will be a limit at some point beyond which there won't be any tangible clarity benefits for 99% of people. Maybe 4k or 5k will even reach it. Same as there will be a limit on framerate in the 165-240 range.
gpt
Yeah similar to hz. The 500 hz monitors to me are just a gimmick.