Predictably, the non-education tech press is focusing on iBooks 2.0 and iBooks Author. I still think that iTunes U is the bigger deal for education in the long-term, but somebody outside of the classroom may not recognize that. Interactive textbooks, while certainly an improvement, are still mostly presuming the same model of education that's persisted for 100 years. The importance of iBooks Author is that teachers now have the same tools (for free) that the textbook publishers have. It will be interesting to see what tech-savvy teachers do with that. I would imagine we will soon see content that is a "textbook" in name only.