There's an awesome video on CNN regarding new book printing technology. Being able to order books on demand will definitely make a difference in libraries and being able to stock more content and not being constrained to retain physical copies of old books that can be reprinted. This is the type of technology that will re-define the current generation's ability to adapt technology to be more useful rather than simply entertaining. Ipods/iphones are nice, sure, but how does that affect our society? Music is primarily a form of entertainment, but books can span even more across the ages.
Video-on-demand, sweet. Book-on-demand? KICKASS