It's still a generational, subjective, relearn-able thing. Assuming it's true that high framerates make it harder to trick the eye - so what? Nobody complained about Yoda blatantly being a puppet. There are lots of dimensions in which you can suspend your disbelief. If your assertion is true, it simply means we have to suspend our disbelief in makeup, set design etc just a little bit more, in exchange for vastly more realistic motion and artistic space in which to put detail. I think it's a win - I bet set design got a lot harder with the switch to color, too.