wpegg: From a gaming perspective it's looking like it's not going to help you. The tricky thing has always been DirectX support, and that does not seem to be covered (from a very short investigation, happy to be proved wrong here).
Great point. That's where MS has gamers by the... throat with DirectX, which no way in hell they'd ever make open source. So here indeed hitting a big wall when it comes to gaming... But someone in the forums has reported a full successful DirectX install and it would make sense since it's supposed to be able to run MS applications.
But aside from gaming, uses such as those pointed out by Firstpastthepost makes it having great potential.