A process by which one's TV artificially increases the frame rate of video in order to remove motion blur. As a result, some movies and TV shows have an exaggeratedly realistic visual quality more typical of videotape than film. The process is also called "motion interpolation," and is known informally as the "soap opera effect." I think motion smoothing is the reason why everything looks weird on your new TV. Motion smoothing can be helpful if you're watching something particularly fast-paced, like sports.