Some official Xbox One information released today on licensing, connectivity and privacy features -
LinkI've picked the most salient points out :
Trade-in and resell your disc-based games: Today, some gamers choose to sell their old disc-based games back for cash and credit. We designed Xbox One so game publishers can enable you to trade in your games at participating retailers. Microsoft does not charge a platform fee to retailers, publishers, or consumers for enabling transfer of these games.
So no fees to play used-games.. but you can only sell them to participating retailers if the publishers have enabled a trade-in feature.. so buying/selling on ebay is out of the question and the trade-in price will be determined by the retail-stores.
Give your games to friends: Xbox One is designed so game publishers can enable you to give your disc-based games to your friends. There are no fees charged as part of these transfers. There are two requirements: you can only give them to people who have been on your friends list for at least 30 days and each game can only be given once.
You cant loan games out to your friends.. but you can give them to your friends for free.. provided they have been on your friends list for 30 days. After the initial "give", your friend cant "give" the game again.
Share access to your games with everyone inside your home: Your friends and family, your guests and acquaintances get unlimited access to all of your games. Anyone can play your games on your console--regardless of whether you are logged in or their relationship to you.
Everyone can play your games on your console regardless of whether you are logged in or not.
You are in control of when Kinect sensing is On, Off or Paused: If you don’t want the Kinect sensor on while playing games or enjoying your entertainment, you can pause Kinect. To turn off your Xbox One, just say “Xbox Off.” When the system is off, it’s only listening for the single voice command -- “Xbox On,” and you can even turn that feature off too. Some apps and games may require Kinect functionality to operate, so you’ll need to turn it back on for these experiences.
You can turn Kinect off at will.
With Xbox One you can game offline for up to 24 hours on your primary console, or one hour if you are logged on to a separate console accessing your library. Offline gaming is not possible after these prescribed times until you re-establish a connection, but you can still watch live TV and enjoy Blu-ray and DVD movies.
You need to log-in every so often to play games. Personally I log in every time the 360 turns on automatically - this is not a massive problem for me as long as my internet doesn't die.
IMO.. this is just like steam.. except it requires more online connectivity.. but there is the possibility of trade-ins.. its not offputting to me.. but if sony offer no fee on used games and the ability to sell to anyone.. that's obviously going to be more appealing to me.