I just watched the single-disc edition.
Whoah.
This is the mother of all reference DVDs. And one think I really like is that it's even shot with anamorphic lenses, unlike other Super35 favorites.

Christopher Nolan says he likes as little grain as possible and boy does it show. I know you really can't say "this looks like high-def", but in the back of my mind I couldn't help wondering how on earth an HD transfer could reveal any more detail (I know, I know it can).
The movie was great as well (hadn't seen it at the cinema).