The beginning of “Tron: Legacy” opens with a statement letting audience members know that some parts of the movie were filmed in 2D, are shown in 2D, but they should keep their 3D glasses on throughout the whole movie anyway. One of the chief complaints about 3D movies is the glasses. So, for those who would like to keep those glasses off for a while just know that parts of the movie shot in the real world is in 2D and shots taking place in the world of Tron are in 3D.
The 3D world is everything you would expect it to be in this movie: spectacular! The original movie was practically a 3D movie without the glasses. The gaming action sequences almost make audience members feel like they are on The Grid. The disk battles and the laser cycles are back and much improved than before as the battles now take place on multi-dimensional fields. The cycles can now drive on upside down courses and do jumps leaving their laser walls behind in all manners. There are also flying vehicles that leave laser wall trails too.