Just saw this while browsing the web at work. It's an roadmap about Microsoft's consoles until 2015.
It's an 56 page long *.PDF document which was published at the Social-Publishing-Site Scribd.com (but now deleted with action from Microsoft's lawyer).
This isn't a new document, it was written back in august 2010. It may seems a little suspect, but Experts and CNet think that this is legit.