I went to see this last night purely to see what a high frame rate film looks like. (Just to get the film review out of the way, it's pretty dull).
High frame rate is an interesting choice for action films. First off the soap opera effect is present and correct, and does make things look a little cheap. If you can get over that it does have the positive of making incredible crisp, clear, detailed 3D - as in genuinely looking like a full diorama into the screen that far exceeds another other 3D I've ever seen.
On still scenes there's a weird effect that makes it look like every single element has been add to the frame separately in post production even though you're sure the actors were filmed live on set.
All this is forgiven as soon as the camera pans because movement is always really clear with zero blur no mater how frantic the action gets. There's a motorbike chase scene with some extreme aerobatics that just looks "real" - like you're sat in front of the actual stunt happening just meters away from you!
I can't recommend anyone actually go watch this, because it's not an engaging film, but when Avatar 2 comes out I would definitely recommend seeking out the 3D high frame rate version over the 2D version. Seeing Pandora like this would be something special, even if the film turns out to be pap.