Yes. Although, sadly... movies tend to make more on DVD now days than they do in the theatres.
Notice how movies tend to be put on DVD sooner than they used to be... Hell, I was working at a Warner Brothers site today doing some testing and it was where they did all the DVD encoding and compressing of files for DVD releases. One of the rooms I was in, I was 3ft from the new Teenage Mutant Ninja Turtles movie in the can. Pretty much still in the theatres I believe, guy was going to start putting together the DVD files and HD encoding.
So much money in equiptment... like multi-million dollar setups, and some old ass fire alarm equiptment protecting it that was state of the art back in 1978.