Microsoft's DRM schemes are being edged out for Apple's DRM, and Microsoft's not happy. They're actually screaming about Apple controlling the market (that they wanted to control and limit, of course).
I actually wouldn't mind taking a look at Apple's music store. This could be the application that convinces me to get a Windows box. I'd still end up jumping through the hoops of buying, burning, and ripping the tracks to ogg files, so I could listen on my linux box.