Here is an interesting video from
IDEO, a global design company, about how they envision the future of the book. Their design concept is broken down into three tracks: Nelson, Coupland, and Alice. Nelson is a reading experience that comprises multiple perspectives, Coupland incorporates social networking into the experience, and Alice invites the reader to engage in the story telling process.
The video has some really interesting ideas and is worth a watch. In addition, here is an
article with more information.