Not really (Score 1)

From the writeup, it's not at all clear that they COULD release it for the desktop even if they wanted to. Quite likely the microsoft agreement is specific to consumer devices. Note that these people aren't going to be AS worried about open-source(though they may demand that they can BUY use of the source and some guarantee of continued availability). They WILL however be worried about the legality of licensing, which I'm guess is probably rather iffy at best with MPlayer...