There's genuinely no economic incentive for them not to sell their own OS down the river at this point.
Mac has established itself as a only-on-mac-hardware market, which rules it out as an option for the majority of corporate and educational settings, and while I wish the year-of-the-linux-desktop was actually coming, most coorporations just aren't set up to / don't understand how to manage OSs without the fallback of a company guaranteeing support.
I see a lot of people celebrating Windows 95 as a high point, and it isn't really a surprise - that was one of the last times that Windows had to genuinely attempt to compete economically for their OS share.