Once more I have to say: MS IS DEAD. AND SO ARE WINDOWS PCs.
Not any time soon. Once Apple decides to release a mid-range system then, maybe, it will dent Windows. I'm not going to pay $1200 for what is essentially a laptop with a fancy display. You can buy a Quad Core for less or an i7 for a couple hundred dollars more. A lot more bang for your buck the PC or Hackintosh route.
When Apple starts listening to what their customers want then they have a much greater chance of putting a dent into Microsoft's business.