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.
Replying because I had a quandary like this just last night, otherwise I might not have much to add. I was watching the movie Kwaidan/Kaidan (1964) and it turned out to be one of the most visually striking movies I've ever seen. It's also very theatrical, with obviously painted skies and artificial sets. So early on I got the bright idea to watch it with frame generation to see if it made it even more theatrical, enhancing the visual experience. I used the utility Lossless Scaling (handy little thing, available on Steam) and its frame gen to predictively double the frame rate.
The frame gen worked decently but it was just too uncanny. I felt like I wasn't watching a sculpted, crafted work any more and I was just watching people in costume run around goofily in front of me. Small inconsistencies in manual camera panning speed also seemed to get much more noticeable. So I settled for an 'unenhanced' offering. The imperfections and sense of random humanity you get from a theatre performance are not necessarily what you want to experience from cinema.
I've known people who act like something being 30fps, 60fps or 144fps makes no difference. Several years ago I might claim to be baffled by their obliviousness, but by now I know that humans operate on some very different levels of consciousness. Many different things can serve as a filter, this is just one.