Motion Smoothing.
No a strangely named Hollywood exec, but a feature most people's TVs, particularly 120hz TVs, have and which with very many TVs defaults to on, and even if turned off, likes to find exotic ways to turn itself back on. Motion smoothing will make anything look cheap. Indeed it is particularly good at making everything look like it's on a set (which to be fair, it usually is) and any kind of framerate above 30 seems to be pretty good at making props look cheap (you can fight this, but it requires special attention and using very realistic-looking props - more realistic than most movies/shows us).
Several times I've come across someone saying "X looks cheap" or whatever, and it turns out that motion smoothing had been engaged when they watched it. A friend of mine did this a few years back - turned down the lights, switched the TV to the pre-configured "movie" mode, which engaged a bunch of stuff, but which inexplicably or possibly through the work of the devil or demiurge or similar, turned on motion smoothing. I spotted it pretty quickly, but he was very sure it wasn't on because he'd turned it off. I have another friend who actively turns on motion smoothing - I don't take his advice re: anything about aesthetics or movies/TV!
As a bonus, many TVs rename motion smoothing in order to make it sound like it's some kind of exotic cool feature you want on, which is pretty evil imho.