The point of the thread is clearly stated in the original post. They're just trying to find out if there is any interest in the US based developers in the Scirra community to put their games and such onto the Windows 7 marketplace and, if there is, to find a way to make it easier for us to do so.
John (the MS rep) has already stated that he is only able to work with people living in the US right now. It's not his call, and it's understandable why Microsoft would want to start off with just the US for now, and then branch out to other countries afterwards if it proves successful.
The ones you should be mad at are us US based Construct 2 users if we don't make a big enough case for Microsoft to follow through with Construct 2 support!