C3PX said:
if he put enough detail into to make them look like the actors, then it would loose a lot of its character.

Those would make pretty cool DVD covers.

It wouldn't require any more detail- just a different emphasis on different features. I did a lot of projects in college - very similar to this style- only using cut pieces of construction paper (nothing more) and I was still able to make the celebrities I was portraying recognizable.

I get that he obviously wasn't trying to get the characters to look like the actors, since all the people in all of his posters kind of look similar. It's just an aesthetic thing for me, I don't really care for his technique in that way.

Just my opinion- nothing more. :-)