Put two videos together 120 fps and 30 fps, see for yourself the difference (keep in mind using 120hz monitor or higher) it's better than explanationhigh frame rates are important for interactivity. ie. how fast a game responds to your input in say a first person shooter. but you are using static pre-rendered video files - there is no interaction. are you saying a pixar movie that runs at 24 fps in cinemas is not a smooth experience? don't you think that disney would also like to provide us with the "smoothest experience" possible and yet they (and everybody else) are using 24 fps.