Well they have confirmed most of the details and some is as bad as expected while others are bad but could be worse
http://news.xbox.com/2013/06/main
Some highlights
-No loaning/renting games at launch. May look into it down the line
-Need to connect to their servers at least once every 24 hours to play games.
-Trade-ins allowed to a certain degree. Only through certain retailers, and only if the publishers allow it.
-Publishers may also charge a fee for buying a used game.
-Can only "lend" a physical game once. Once you do, it's removed from your account and you lose ownership. And must have been friends for 30 days.
-Can play any of your games on any Xbox One using your account. But need to check in every hour.
-Can share your account with up to 10 people... This is kind of vague
Think those are the highlights.