I can't bring myself to go watch a movie just to see a JJ Abrams trailer. I did that in 1998 for Episode 1 directed by George Lucas. It was fun, theater hopping across multiple theaters to see the trailer and then leaving without bothering with the movie (it was The Waterboy).
Also later that same day the Episode 1 teaser was on the internet and ready to download thanks to cam copies. Anyways I know the new trailer is Star Wars but its just not the same for me.