Ebooks will be on their way to being a match when readers come with facing-page screens, spine and cover screens (I've forgotten the authors of ebooks I'm actively reading because I don't get reminded of the title & author passively by just having the book around me) and some kind of much better interface for locating and bouncing between bookmarks, which interface will probably need to not reside entirely on the main screen(s) in order to make a real difference. Still missing a lot, but that'll close maybe half the gap.