Originally Posted by Jocchan
Sorry, but no. 3D will help the player evaluating distances, but that's just part of the reason why camera control is useful during gameplay.
A much more important reason to change the camera angle is to avoid objects in the way (often including the main character) or to look around and search for interactive objects.
I guess so, though those problems can also be circumvented with decent camera AI/level design. Then again I'm guessing I'm hoping for too much to expect that game developers would actually know how to do that.