In games, I agree. But when CAPTURING a movie, it IS the fps you set the movierecorde to (camera)
So if you set it at 24p or 30p or 60p or 1p, it DOES make 24, 30, 60 or 1 frame per second.
So if you replay that movie on say a tv, it does play at 24, 30, 60 or 1 fps; stutter free.
But with games there's the v-sync stuff that can creat shaky stuff. Or if you have SLi you might have micro-stuttering as it's called.
Yes, mafia is also a game, but it's more of a story...