The old paper form of a textbook is certain to die. I'm sure of it.
The new form of a "textbook" has a feature list that turns the textbook from something people read to something people experience. Note that this feature list isn't fantasy, nearly all of these features already exist in some form.
Here are the features I think every textbook should have.
What else would you like to see in a textbook?
David is a Formative Assessment Specialist for Mathematics at New Visions for Public Schools in NYC. He has been teaching since 2002, and has worked in Brooklyn, London, Bangkok, and Vancouver before moving back to the United States. He has his Masters degree in Educational Technology from UBC, and is the co-author of a mathematics textbook. He has been published in ISTE's Leading and Learning, Educational Technology Solutions, The Software Developers Journal, The Bangkok Post and Edutopia. He blogs with the Cooperative Catalyst, and is the Assessment group facilitator for Edutopia. He has also helped organize the first Edcamp in Canada, and TEDxKIDS@BC.