so what you're essentially saying is that you don't want competition and that even though the service just started and provides a way for regular users to download apps knowing they are not malware infected (at least if the checkers work) you want it to die without trying? look, I'm not trying to start a flaming war or anything, but Linux has these package downloader that acts like App Store (Ubuntoo does at least iirc) and that's a desktop as well, and pretty sure OSX has an app store as well, why is it suddenly a problem when Microsoft does it?
and on another note, steam when it first started, it wasn't as good as it is now either, these things take time to build, i feel an app store just complements windows, it's not the one and only way which is the good part, if Microsoft decides to prevent people from installing software not from the app store (not apps, lets just get that straight) for full blown windows then I'll have a problem with it, otherwise what they are doing now is perfectly fine
one thing with the app store as well is it's easy to download and install apps, which is the biggest benefit of it all