> Whats worse is they could all pull it off if they invest in existing Distros and hire people to build out the main infrastructure they need

I don't know about that, I've seen what kinds of systems the existing distros build and I'm not impressed. Which isn't to say that Microsoft would definitely better, seeing as they are doing their best to become a Linux distro themselves while embracing all the bad behaviors that entails, but your statement certainly isn't a given.