Blame the director!
3D is the next best thing in Films... you spoke of immersion of "plot" and "story"... well, personally I felt the theatre 3d effect, using polarized glasses, watching Coraline was completely worth the extra $$ (early on) to subsidize the theatre's switch to digital 3D projectors and compatible screens. About 30 minutes into the film, I completely forgot I was wearing the glasses and the 3d effects became normalized, when I watched another movie in 2D the next week, it left me feeling a little empty. For those that have not seen Coraline in RealD , you really missed something special. Gimmicks were kept to a minimum and the immersion was increased 10 fold, you really felt as if you were part of the world around you. Just as "3D" sound is in all good movie theatres these days, so will digital 3D make it's way. I will use Coraline again as an excellent example of a good 3D film, it was made using almost 100% stop motion capture, NOT computer graphics, (ie. Up, and M vs. A) It really does make a difference when you see real things with real lighting, in real 3d. It's nothing less than breathtaking, subtle, but amazing, and totally worth it. I've seen the Blu-Ray version of Coraline at home on a 92" projection screen in 2D, while the movie was fine and beautifully filmed on it's own, I missed the inherent lack of depth that RealD filming techniques gave the theatre version.