Maturin will come in here and say that it wasn't endless green screen, etc. I think that they used too much green screen in the prequels. Some - not all, but some - entire sets were made of CG. They were obvious and terrible.It's already different if only for the sole fact that they are using a lot of actual sets and locations instead of endless green screen garbage.
I'm afraid he's going to have like a couple of minutes with a bigger role to follow in VIII... I hope I'm wrong and they are just setting up a big reveal. There was a leaked picture of Hamill in costume, though.They didn't include Luke on the poster? What does he have, 10 seconds in the film?
Also, when I'm at it, you who have read/seen anything else than the 6 movies (so, really anything from the EU), what is my absolutely must see/read/hear first step? The sheer amount of the countless extra material made me not really want to delve into it, but with the hype around the new film, I think I might want to actually try it. Just don't name any games - I have a Mac and I don't think I'd have the nerves to tweak the Wineskin again to play KOTOR or whatever. (Believe me, I've tried)