The point is that it gives the world the distinctive impression that Microsoft's own devs are still running XP, and are planning to do so for a long time since they present their upcoming 2010 software on it. Apparently Episode IV was made on Vista a last.
Will it work on the server? I know it sounds odd, but I have this scenario where a server would need to send peer-to-peer "proactive" notifications to clients (so the server would be a peer, with a potentially large cloud of clients). The current Windows
XP Peer-to-Peer stuff does not work (or at least cannot be installed on) Windows Server 2003, are you planning to allow installation of the P2P infrastructure on the server?