Kotaku heard several rumors about Microsoft's next-gen console. The first one is that the new console will adopt Blu-ray, and the second one is that Microsoft is devising a plan to incorporate some sort of anti-used game system. Additionally, Kotaku also reports that the next Xbox will offer a new version of Kinect with an onboard processor.
It's not clear if that means that the system wouldn't play used games or how such a set-up would work. Obvious approaches—I'm theorizing here—like linking a copy of a game to a specific Xbox Live account could seemingly be foiled by used-game owners who would keep their system offline. My source wasn't sure how Microsoft intended to implement any anti-used game system in the new machine.
A push in any way by Microsoft against used games would likely be cheered from publishers sick of seeing retailers like GameStop crow about their revenues from the sale of used games. But it could potentially anger consumers who rely on buying cheaply-sold used games or even pass games to relatives or friends.