Microsoft Windows 8 App Store?

Seeing the launch today of the Apple Mac Store (and hearing from friends/ colleagues) I have a feeling that the Mac App Store will be game changing for Desktops. (Chrome App Store will also if her market share keeps climbing the way it is).

Coming Soon?

So, the real question is when will Microsoft launch their own App Store? Will they surprise us and use Internet Explorer 9 as a backdoor in? As a software update? Or as a part of Windows 8?

Guesses in the comments please…