MS have finally confirmed some of the outstanding issues regarding DRM, used games and privacy. It looks pretty bad for consumers. http://news.xbox.com/2013/06/main
No renting, no loaning. No private sales (unless selling to someone who has been on your friends list for 30 days)
Console Checks in Every 24 hours
Trade-ins are up to the publisher and only at participating retailers
You can give a game to a friend only if they have been on your friends list for 30 days, and then it is stuck with them.
Up to 10 family members can play your games from any console at any time