E-books with stylus with an interactive screen, text, and margins.
It would be really cool if we were able to takes notes on margins or the reader could highlight certain text and add notes to it. It would also be cool if some books had links or fun little animations that are exclusive to E-books. I think E-books could potentially be great in many aspects, but it needs to evolve much faster than where it currently is. Someone should benefit from this idea and produce this product or are they already producing this features?
It would feel like your annotating text in school again! =D
So much resources could be saved.