Digital Textbooks

This article, by Charlie Osborne with CNET,  is about a company call Kno that is teaming up with Houghton Mifflin Harcourt to offer digital textbooks for $9.99.  The K-12 state specific books available through the app come with interactive features including automatic flash cards of key terms, a journal of student's notes, and links to relevant academic material including video.  Sounds like a great idea.  It's too bad that schools cannot pick up the tab.  I wonder how many lower socio-economic families will be willing or able to spend the $60.00 so their children won't have to lug a backpack filled with heavy books to school and back home.