"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus
That's how it started, and how I saw it running last November when I visited Taipei. It's really meant to run Linux.
Microsoft is in desperation mode. That's the only reason they're allowing this. They see their market getting eaten from above (OS-X, Macs) and below (Linux, Eee-PC).
Even with 90% of the desktop market still theirs, they sense the deterioration, and are willing to allow XP to live even though it hurts Vista, because otherwise their market will collapse around them.
For a story of how an Empire can collapse even though it rules everything, read Asimov's "Foundation" trilogy.