It just feels more "fluid" and real, and then you get used to it and 60Hz feels jittery. I have an iPad pro, and its honestly made me consider going with an iPhone Pro (I still have just the non-pro model), although not quite yet. However, I notice a huge difference between scrolling on my phone and scrolling on my ipad.

Its the same thing about retina vs. the previous resolutions we had put up with. Yes, you don't need them for text, but once you get used to it for text you don't want to go back.