However there are businesses out there who like to work in a single vendor system as much as they can. I have no doubt that Microsoft will come out with their own Linux distro in the next 2-3 years. They don't need too, but they also didn't need to do lots of the things they have done recently.
I feel like I've accidentally stumbled upon some internal discussion group of Microsoft's where very low level employees who completely misunderstand the market give their Microsoft-centric view of the world.
I am assuming you believe Microsoft will not be venturing into the world of building their own Linux distribution?