Google seems hell-bent on establishing a worldwide public on-line library of digitized books.
Ruling Spurs Effort to Form Digital Public Library – NYTimes.com
It will not be trouble-free to establish, as a library with paper books has control over who borrows what and the amount of loaned out books correlates with the amount of purchased books. That’s not the case here.
A company with less financial power would not risk doing this.