For a counterpoint: http://www.tweakguides.com/Graphics_5.html

Citing: http://amo.net/NT/02-21-01FPS.html and: http://www.100fps.com/how_many_frames_can_humans_see.htm

The human eye's ability to detect change exceeds 200 fps, though "fps" isn't really a good match for how the eyes process information, which is highly dependent upon the scene in question.

Yes, there is. I have side-by-side 60Hz and 120Hz monitors, and window dragging for example on the 120Hz one is much much smoother (I had to buy a gaming mouse, because most normal mice won't update at more than 100Hz I think). And movies don't have this jerky motion where 60Hz doesn't quite exactly divide with 24 fps that movies use.

Haha, good one. Isn't trolling against the rules here though?