High res isn't very clear when the image is frequently blurry because of slow pixel response times. Higher performance monitors end up more immersive in practice because of their low latency and fast pixel response times. Gaming with high performance displays, even casually, is a much more fun experience.
I only play racing games/sims, and I have a hard time imaging that higher than 60fps would make things less blurry, because what I have doesn't seem to sacrifice image quality at all. Would I see the light if I tried 120hz? Or does it depend too much on the game type?
