priteshmodi on 31 July 2010
This isn't the new logo. It's a short animation that was played by Microsoft at a presentation during MGX. It was meant to show the flexibility of Microsoft's different products and how they integrate with one another.
Here's the full animation: http://www.engadget.com/2010/07/22/new-microsoft-brand-logos-company-tagline-revealed-at-mgx-event/
The second update clarifies the fact that it isn't a new logo.
