We've had large screen and quality surround sound since 1997. It immediately cut down on theater going because my sound system was so much better I was always disappointed in the theater. Got so we would only go to the theater once in awhile especially to get that "large screen" effect. But with all the other stuff mentioned here, it got less and less. The last one was "The Hobbit" -- we postponed a long time seeing that, but finally went. Only about 10 others in the theater. I left just wanting to get the BD so I could REALLY enjoy it. And I did!
Now movies are pretty much only to take the grandsons.