I really like the idea but it should absolutely be geared towards universities and college students - 1) they're more likely to have the iOS devices necessary to use iBooks and 2) already are used to paying for their own texts and would jump at this chance for cheaper and more portable options. As far as I know, most public high schools provide the texts for their students and making such a significant transition in learning medium is likely to get stuck in the bureaucracy of district budget planning....
All in all though I think this is a game changer looking 4-5 years down the road.
All in all though I think this is a game changer looking 4-5 years down the road.