It has been 25 years since Microsoft introduced the 4 color waving flag logo with Windows 95. They have announced plans to update it in conjunction with the release of Windows 8. The new logo is shown below.
While this log is still quite similar to the previous version, it shares the same tiled look as the Windows 8 user interface. You can see the short video on YouTube or read more about this at http://aka.ms/logoShare