You notice I did not say the human eye can only see 30 fps ? After 30 your eyes see it as fluid motion which is why you notice a difference between 15-30 more than 30-60. Do you see 60fps sure but the further you go the more it becomes unnoticeable. There's a program out there that will run 2 split screens one at 30 fps and one at 60 you notice a difference, but try it at 60 and 100 the differences will not be as noticeable. It's why these 120hz and 240hz TVs are bs MOST people will not notice the difference especially once you get into the 100s. The ones that claim to notice it well I guess if you tell yourself you notice it enough times you start to believe it even if trained doctors tell you otherwise.