It's been talked about many times. Say you have kids and a life and can't watch an entire movie in one sitting.
These two don't make sense together. If you watch most movies in the theater, then you don't have "new things" to see either.
I DO have kids
I only see one or two movies in the theatre a year ...my comment above was simply to illustrate that I don't really care that they are going to be out a month later than the DVD. That's where I'll give some business back to the brick-n-mortar stores if I need it then.
Sure, it would be great if the rentals lasted for 5 days. But 1 day isn't going to drive me away from the service ...I guess the execs figure if you had 5 days you might call friends over within the next day or so to re-watch the movie with you.