I would certainly love it if Microsoft stopped trying to sell Windows and just open sourced it. I think Windows is a much more pleasant desktop operating system than Linux, minus all the ads and mandatory bloat Microsoft has put in lately. But if Windows was open source the community could just take that out.

I really don't see it happening any time in the next decade at least, though. While Windows might not be Microsoft's biggest focus any more it's still a huge income stream for them. They won't just give that up.