Actually 90% of the DVD I bought, I never watched in the Theater. I don't know, I am just not a theater guy, most of the time, even if I liked a movie, I wouldn't watch it during it's theatrical run, and just watch it after I get the DVD.
For one, I passed on Pixar's Cars.
I usually base my purchases on a DVD's reviews, feedbacks, and whether the subject matter is of my interest.