Yes, why not? A man buys a book at a store. He can lend it to his wife. However, an e-book purchased from an online seller is stuck on an iPad and can't be lent to anyone unless that person lends his iPad. There are a number of e-book technologies that have digital locks and prevent copying. For the moment, users don't have the same option at all. So the system has to be reviewed considering these possibilities. That's the most technologically neutral.
On February 3rd, 2011. See this statement in context.