Why movies look weird at 48fps but games are better at 60fps

This really bugs the hell out of me, especially on 120Hz TVs. Granted, sports and newscasts look like you're sitting right there which is neat, but for fictional shows it's unnerving. My sister has one of those TVs, and we occasionally go over there to watch The Walking Dead with them. It's as if the video is being slightly fast-forwarded, paused, then fast-forwarded again, but the dialogue still sounds normal throughout. It really takes us out of the moment and looks more like a documentary of the making of the show, rather than the show itself.