Microsoft Mediaroom IPTV better than cable or satellite ?

" Microsoft's Mediaroom is the company's IPTV solution that brings TV into to your house (much like cable and satellite) over IP."  source news.

I think that systems and companies like www.joost.com cannot even think of competiting with Microsoft. After all Microsoft has got xboxes, pc's with their operating systems in virtually every room in the world... Business or consumer. They have a huge marketing gun too and they provide support.

Where does that leaves the like of Skype and Joost ?
Product : [MediaRoom]