A friend recently picked-up an LED "3D" tv. Now, I always thought the 3D is a BS gimmick, and I still do, though I will conceed that it does work far better than I ever thought it would. Which is, not at all.
But the TV -- a samsung -- had a feature that reminds me a bit of up-converting, however it's used on every input, even 1080P from the blu ray. I googled it at the time but the gist is that it, on 2D mode, it computes deltas between frames and inserts new ones to make the image seem more fluid.
IT LOOKED LIKE TRASH!
It made everything look soap-opera or like a documentary. It messed up the depth of field. Sure, things were hyper-crisp but alarmingly so. It made it look cheap. Now, there's a setting buried in the control panel to tweak or disable that, but this is how it came from the factory, and i thought it was un-watchable.
So it's not merely lighting.
One last thought which is I actually think the perception of higher quality shots in films has a lot to do with stedicam which of course will be the same at 60fps. But that's just a guess.