Maybe gaming? When you play a lot of FPS in 120Hz then action scenes in the movies just look like blurred stuttering mess.
And stereoscopic 24fps look twice as bad.
And stereoscopic 24fps look twice as bad.
I think you can notice high frame rates. Difference between 60 and 120 fps is striking. Even between 90 and 120. And everyone I was showing my phone that does 60, 90 or 120Hz could see it.
Conversely I don't see much difference between 120 and 240 fps.