There is a theory that a thing so smooth as 120hz falls in the "very real but not quite real" case, or the Uncanny Valley. Whereas 24fps tells our brain we're c

There is a theory that a thing so smooth as 120hz falls in the "very real but not quite real" case, or the Uncanny Valley. Whereas 24fps tells our brain we're clearly watching a movie and so it's ok. Just like those highly realistic dolls from Japan where you can tell something is wrong but you can't quite put your finger on it.