The Kno: Is it a tablet, an eReader, or an electronic notebook?

I love new technology, and I’m especially excited about tablet PCs, eReaders, slates, PDAs, etc. The Kno is being promoted as an electronic textbook and offers the possibility of classrooms without printed textbooks and the notion of saving millions of trees annually. What do you think about such a device and the implications it presents for learning, the textbook industry, and tablet computing? I’m interested in knowing how it will identify itself as a user-agent in web server access logs!