Harmy had one, but I don't know how to search for it. In short, 35mm prints are copies of copies of copies. Each copy creates degreadation in the form of additional film grain. This grain eats up fine detail with each generation. The bluray, on the other hand, is directly from the film negative. So while its colors might be messed up, you can see the actors' pores, each individial hairs etc. The 35mm prints don't have all of this detail. Yes, they were meant to be shown on big screens, but they weren't meant to be pixel peeped.