The next Xbox 360 will not include a disc drive we can confirm. Instead it will include some kind of interchangeable solid state storage card, such as your standard SD. It’s not known at this time, if it will be a standard or proprietary format. It will be launching in 2013. Microsoft issued a full statement to MCV.
“Xbox 360 has found new ways to extend its lifecycle like introducing the world to controller-free experiences with Kinect and re-inventing the console with a new dashboard and new entertainment content partnerships. We are always thinking about what is next for our platform and how to continue to defy the lifecycle convention. Beyond that we do not comment on rumors or speculation.”