Supporting a proprietary platform on Raspberry Pi kind of defeats the point of the openness on which Raspberry Pi was built, no?
edit: oh no, I've run afoul of the Broadcom shills. Oh well.
I'm not encouraging any particular software package, simply correcting a misconception.
Maybe I'm wrong and they mean a person or organization, in which case I'm not sure who they mean. Windows does not appear on the official Raspberry Pi website front page or blog.