Fraser Speirs gives a good overview of the good and bad regarding the new iBooks textbooks, iBooks Author, and iTunes U:

Apple already revolutionized education when it invented the iPad. While iBooks textbooks are a bridge from the past to the future—and we do need a way to get to the future—they are not that future. If Henry Ford had been an educational publisher, his customers would have asked for electronic textbooks instead of faster horses.

The Good and Bad of Apple’s Education Announcements