Yup... With my huge TV, surround sound, and really comfy couch, I can get the theater experience without the ridiculous ticket price, $20 popcorn, and have the ability to pause the movie if I need to pee... The only sacrifice I make is waiting a few months.
Bah. Going to the movies on Saturday night is part of the American Experience
A home theater is nice and all, but there's no duplicating the "theater experience" of going out to the big screen. The sights, smells, sounds spark a little nostalgia, plus its an actual "event" to go to, and not just another night on the couch.
Also, while I suppose if you are dragging several kids along it could get very expensive, a movie date these days is a cheap date compared to many other options. I'm not sure what secluded island you're living on that popcorn is $20, but it's nowhere near that here. 2 tickets to a 2-hour movie, a shared popcorn and 2 drinks will run you about the same as 45 minutes, two dinners and an appetizer at a chain like Ruby Tuesday's or Chile's, or an hour at an arcade.