I suspect the content here won’t be quite as exciting as the title, but I would recommend this very measured take on the future of the textbook, in light of Discovery Educations’ Beyond the Textbook forum in DC. (Also, check out Discovery’s Beyond the Textbook homepage, where the showcase their digital science textbook, though, as the blog and others have said, to call this new wave a digital textbook might have the wrong connotations if it implies simply a dressed up version of the old textbook, i.e. if it is to print textbooks what powerpoint is to lectures: http://www.discoveryeducation.com/administrators/curricular-resources/science-techbook/).