I think the next step after the introduction of Internet ready Solar Tablets for developing countries like India and others in Africa is to establish learning communities around Open Source Textbooks. Free books with an open license that makes it possible to keep the book up to date. If successfully implemented these communities could improve the learning experience for the student. Being able download an Open Source Textbook and ask questions on the content of the book, read alternative explanations, view video and cooperate with others on-line would go far.
I think this is where the innovation needs to be, not making the textbook look like something that fell out of a Hollywood movie.