>= 120Hz is great for everything, not just games. Moving your mouse (or scrolling) on a 60Hz monitor after you've used something higher is like looking at a slide show.
For example, on a 60Hz monitoring, try panning around a Google Map and reading the labels. They just become a mushy blur. On a higher refresh-rate display, you can read the labels as they move. (I always found this to be an interesting demo: https://testufo.com/persistence)
Nice website, thanks for linking it. But, it looks like I'm in the minority here - having always worked on 60Hz screen computers and never finding myself wishing for higher refresh rate than a better screen ratio. Perhaps, personally speaking, my priorities are different.
For example, on a 60Hz monitoring, try panning around a Google Map and reading the labels. They just become a mushy blur. On a higher refresh-rate display, you can read the labels as they move. (I always found this to be an interesting demo: https://testufo.com/persistence)