Windows Media Center is used on an average by over 13 million unique users per month, revealed Microsoft at the 2009 National Association of Broadcasters (NAB) Show. Accordig to Microsoft, the number of Windows users turning to Windows Media Center for “consuming” their digital content had steadily grown, it is precisely the new content made available for Windows Media Center that has managed to increase the audience. “Worldwide momentum for connected TV services powered by Microsoft Mediaroom continues to build with the number of Mediaroom subscribers expected to hit 3 million next month. In the past 12 months, the number of subscribers has more than doubled, lifting Mediaroom to the No. 1 spot in the global IPTV middleware market, according to new figures from Screen Digest,” revealed the Redmond company.