Ballmer just announced this at the Consumer Electronics Show keynote today.

looks like a follow up on what Patrick reported a couple months ago.

http://www.giantbomb.com/news/microsoft-turning-kinect-into-a-business-tool-early-next-year/3777/

Here's the relevant bit of the update via Barron's, for those who care

http://blogs.barrons.com/techtraderdaily/2012/01/09/ces-ballmers-last-time-at-bat/

...We’re getting a demo of using the “Kinect” controller to interact with episodes of Sesame Street. The young assistant on stage demonstrates using a throwing gesture to help out Grover by “throwing” a coconut that appears to land in Grover’s box of coconuts I the episode playing on screen.

Ballmer announces Kinect will be coming to Windows on February 1st.

And that’s pretty much it. I closing, Seacrest asked Ballmer what he thought the future would bring. Ballmer, in a spoof of his legendary boisterous style, remarked “Metro, Metro, Metro,” referring to the name for the Windows 8 user interface. Then he added, “Windows! Windows! Windows!

Oh boy!