The industry standard framerate for TV shows and movies is 24 fps. This creates the "movie" feeling that distinguishes a fictional product from a reality TV show like Cops. However, all smart TVs currently come with a feature with various names like "motion smoothing" that creates fake frames to "upscale" movies to 48 fps or 60 fps. This results in a bizarre visual effect that makes everything look closer to real life, so instead of enjoying suspense of disbelief you feel like you're watching a bunch of actors play dress-up in a backyard (which is what they are doing, yes).

Personally I can't stand this, I have no idea what kind of idiotic impulse led to its creation, and I try to turn it off every time I see it (which requires wading around in submenus because there's no industry standard name for it), but at this point I've run into multiple people who don't even seem to detect a difference between 24 and 48 fps. To me this is one of those things that make me question if some individuals are living in a different reality. I can't imagine watching an entire movie that's been "upscaled" to look like a AA-tier in-engine game cutscene.

Scaling anime fight clips to 60 fps and 4K has become a cottage industry on youtube as well. The best you can hope for is that it doesn't hurt the original content too much.

I find that ignorance or indifference to this is tied to a person's tolerance for slop like soap operas or Netflix originals. It's genuinely disturbing.