You realise it was shot in 3D right? It was made with 3D in mine, the film would be completely different without it, scenes would be different. I couldn't imagine what Jim would have done without 3D in mind, that's what makes him James Cameron and me just IronJimbo. The 3D was actually put in the film as part of the experience, not like hollywood which uses a 8 week post process 3D to snatch every last penny they can (see Marvel movies).