Movies are different that music. In the case of movies, the idea is to immerse the viewer into the movie. With Stereophonic reproduction, the idea is to replicate the sound stage in your living room.
I don't believe it is the future but I can see where some rock concerts may use multichannel to put you in the audience. Likewise, in a symphony, you would hear clapping behind you and to the sides as well as the front. However, to get pure 3D sound, you do need at least three channels, something stereophonic systems don't have today.