This is huge. But at the same time it may mean nothing, because the broader legal and technical environment may make this completely moot. We need to be watching and looking for legal scholars to weigh in on the statement. And we need to test them. Start buying and treating ebooks like we own them rather than licensing. We are considering that right now in our state.
Please read the article. It may be the most important piece of news for libraries since ebooks became mainstream.