Windows 8 version

So I really want to get this game. And I sadly am afraid that I no longer have the patience to wait for steam release. With people having problem with website transactions I want to get the windows 8 version. Seeing as I only had my new comp for a week I have no idea how exactly it works. If I buy Win8 app store version will I need to put my email so Greenheart could send me steam code and if not then how will wind8 shop users get the steam key?

Please refer to this thread.

Steam version for original owners?