I think it's a great idea. DH and I *very* rarely go to a movie theater. He has anxiety issues, we can only go to matinees after the "hype" has died down, and then, only if I can find someone to take over DDs "school" for the day. It's a real headache, so we'd rather wait for the DVD. We've gone to 5 movies in 10 years, literally. It's gotten to where we sometimes even forget about something that appealed to us when it opened and we stumble across it at Netflix or Blockbuster a few years later and go, "Oh, wasn't that something we wanted to see?"
It seems to me that it would save studios a tremendous amount in promotion costs, it would get DVD sales out and up *before* any bad press got around if it were a stinker, and, honestly, the majority of people who go to the theater do it for the theater experience, not just to see what's on the screen. I really don't think they would see much of a drop in attendance. As much as I love Shyamalan's work, he's being too much of a diva on this subject.