Maybe this sounds very immature and prehistoric.. But for God's sake please dont close down the libraries. PEople need to know what it feels like to take a book in hand, smell it, read it, take it with you in your bed, fold it, enjoy it..
On the otherhand, how much ever ambitious the project seems to make digital library a reality and digitize all books, you must not forget that we are humans after all and human nature is hard to change.. We have been used with paper for aeons and it could take generations for the paper culture to fade out (which i suppose should be for good at that time because trees would be scarce)