Haymore

What value would 3D add in isometric game which has 2D backgrounds with fixed perspective? Trine / Trine 2 are 2D games, ever tried to play those with 3D effects on? simply amazing, the whole "world" of the game comes to life. If it is well done, I would definately love this feature. People usualy get headaches if they play fast paced games like FPS with 3D on, but I suspect that this game would be even plesant with it.