There is an interesting blog on The Guardian on books and the Internet by Damien Walter.
This is the concluding paragraph.
"For centuries the book has been the highest symbol of knowledge. The object that has enshrined and preserved knowledge through history. The book is so inextricably linked with our concept of knowledge that for many people it is hard to separate one from the other. But for human knowledge to reach its full potential, we may have to let go of the book-as-object first, or open our thinking to a radically different definition of what a book is."
The full text can be found here: