I have seen movies like Spider-Man, Hulk, 127 Hours which have been shot in 1.85:1 shown pillar boxed in theater, (satisfied with the subject matter being vertical).
But how and why many movies in spite of shot on 1.85:1 (like 'war of the worlds'), Hell boy (being vertical subject matter), The Avengers, MIB 3, Hugo, projected on entire screen. Can you please explain?