There's an awful lot of cock-suredness on this board.
If MS releases this player, which will have full wireless integration with the msTunes Music Store through your home PC with WMA10 or your XBOX360 some people could be persuaded to get it. The end-to-end process in a major part of the iPod experience, and this is MS's plan to get in on it.
Would I get one? No, because I have an Apple computer - but 90% of the world still runs windows, and now they won't have to install third party software or worry about integration issues. Their new PC (or old with new and improved WMA10) will connect right up and automatically fill up their new, media device - all without wires!
Give MS the benefit of the doubt here. If you dismiss them, you run the risk of falling prey to their marketing/sales/monopoly-position machine.