Movies are much more accessible to everyone, and much cheaper as well.
Also, eliminating movies would eliminate an important part of the social structure.
I can just picture someone asking a girl out on a first date....
"Hey, I was wondering.... do you want to go out and play that new strategy game next week?"
Besides, you have to realize not everyone is a gamer, and not everyone would want to get together with their buddies to play the latest game... it's just not something that is widely acceptable.
Going out to the movies isn't just about the movie itself, it's about you and your friends getting out of the house, away from stress elsewhere, hanging out, and just having a good time (also, the dark theatre and armrest-sharing seats can be a great venue to get in some makeout time with your girl
Plain and simple.... NO
, games will not replace movies.... ever
They are two completely different sides of the entertainment spectrum.