Nex-generation digital book

Last week Mr. Hall sent a very interesting link to a TED talk that is very relevant to libraries, schools and the future of books.
Here's the link:
http://www.ted.com/talks/mike_matas.html

Later in the day I watched the clip with two classes of grade seven's. Here is some of the discussion and comments we had.
Cool -- (first and foremost.)
Content could be constantly revised and updated with the latest statistics, info-graphs and maps -- maybe information could also be made country specific rather than looking at info only pertaining to United States we could look at others as well.
Jobs of the future -- graphic design, videographers, software design, copy editors (fact checkers).
Appeals to a larger audience - than just text.
Problems with creating a digital divide between the haves' and the have/nots.
Easily damaged - if you drop it, etc.
Hacking issues.
Eliminates the problem of heavy backpacks.
Choosing the best/right format. What will it be next month - is this the flavour of the week?

Students weren't sure if they would be seeing this sort of textbook in their high-school years, some were optimistic in thinking 2 years, but most thought it was about five years away.