It's not about segregating users. It's about profits, policies, legalities, so on and so forth... But it's never about segregating users. It does a company no good to segregate without reason. Your frustration is understandable, but it does no good to take it out on someone who can't control it.
I'm a US Construct user, and am working on a game that I intend to support mobile with. I can say that I'd definitely be interested in releasing any mobile games to Win7 marketplace, but I'd also have to echo the previous sentiment about Microsoft's support for WebGL. A drop in speed is always detrimental for any action games like platformers and racing games and so on. It'd be interesting to know how Microsoft plans to improve performance for that area of HTML5 gaming.
I also am wondering about the percentages and pricing and such. I don't have any apps in the Apple store, but I have a couple albums in iTunes and Apple likes to take a generous cut of the sales and they largely control the pricing. I was wondering if Microsoft's policies are available for public viewing or if that's a non-disclosure thing you can only know after submission to the Win7 store?
So yeah, top concerns for me are performance and store policies for our games.
I think it's safe to say we do appreciate your interest in our community and Ashley's great game creation kit!