As it has been mentioned elsewhere, this poster is very reminiscent of Hitchcock’s Rear Window. As is, in fact, the whole premise of the movie. I don’t think that is such a good idea, from a marketing standpoint. People don’t want to go see something that seems like a cheap knock off of a great movie.
What the poster should try to do is sell why this movie is unique. Perhaps highlight that it’s set in the suburbs? Or some other distinctive element.
As it is now this looks like the poster for a movie you might watch on the DVD on a lazy Sunday afternoon. Not something you would go to the theaters to see.