I think edamiga1's original post has merit. It is quite clear to me that Microsoft is strangling WMC and will announce its death, probably in 2013 ("we are withdrawing the Media Pack from the Marketplace, because our data shows that it has not sold well").
However, it is also clear that at the moment, there is not a coherent collection of Metro Apps that can take the place of WMC. Optimists think that they will come. I'll be sticking with Win7 on my HTPC until that is the case. I suspect I may have to wait a couple of years at least.
These Apps will probably also have to come from the third party market. I know that they are only "previews", but Microsoft's own Media Apps are appallingly limited, and do not bode well.
I think a lot of WMC users will be sticking with Win7 until Win8 can truly replace it. I suspect this is part of Microsoft's strategy; they will support WMC until they see that 3rd parties have filled the gap in Win8, or until it becomes evident no one is going to, at which point they can just say there is no real interest - even 3rd party developers are ignoring it.