MacWorld is this week and mac types always look to this convention for new announcements. If you are interested, you can watch the keynote tomorrow online (9 Pacific Time). The game is always to predict what the new products will be. I am betting on a pen-oriented, tablet computer (prehaps iNotepad). The Wintel world beat Apple to announcing such a product about 6 months ago. Apple included a pen input system (Inkwell) in OS X and this would make little sense unless they were moving toward some type of hardware that would make use of this method of interaction.
I think tablet computers (something like PDAs on steroids) will eventually be part of K-12 and college education. This will be the device we carry to class and that will be used to study ebooks.