What makes one film art and not another? They are all someone's creative vision. They are all an expression of one's interpretations of events and emotions. Just because Transformers has a huge budget and Michael bay doesn't mean it's not art in some fashion.
Transformers...is not art. Bay didn't sit there and make that film out of artistic vision, he made it based off of a children's TV series for the sole purpose of making himself a shit load of money. Sure, technically it's a film and thus can be classified as "art" in the same way any movie, painting, or song can. But compare Transformers to something like Fellini or Bergman, and you'll see it's not an art film. In any way.
I'm sorry, most of the "great" films bore the shit out of me. Most "art" films focus on settings and colors. I prefer characters and plot to beautiful backgrounds and props.[/rant]
You haven't actually seen many art films have you FTS? Because it has almost nothing to do with set design or colors. I'm talking about Herzog, Truffaut, and Godard here. Any of these ring a bell?