Walter Murch, a famous film editor (Apocalypse Now, The Godfather, Part III, The English Patient, and Cold Mountain which he edited on an off-the-self PowerMac G4 and Final Cut Pro) wrote a great letter to Robert Ebert about why 3D doesn’t work and never will.
3D films remind the audience that they are in a certain “perspective” relationship to the image. It is almost a Brechtian trick. Whereas if the film story has really gripped an audience they are “in” the picture in a kind of dreamlike “spaceless” space. So a good story will give you more dimensionality than you can ever cope with.