Library 2.0 and the future of libraries

Quite frankly my eyes glazed over on reading some of these articles and I thought I was reading Marshall McLuhan--fortunately the Wikipedia article brought more of a sense of reality to the subject. Wendy Schultz's To a Temporary Place in Time provided an interesting projection into a possible future, but in public libraries I myself am not quite ready to give up the pleasurable physical experience of the book to live in a totally 3.0 existence. The blurring of fantasy and reality (40 hours a week of SecondLife cannot be healthy) can have a dangerous side for society. The 4.0 experience sounded better but somehow the author's use of language, and mixed metaphors/concepts got in the way, and I was not sure exactly what reality was really being communicated to me...