If you take only desktop (which is what I was thinking about), windows is waaaaaaaaaay dominating the game. Chromebook might as well not exist (I haven't seen one, ever. I'm in europe though), so the only contender is Mac. But with all the lock-in and momentum Windows has, sure it might not be a monopoly in the technical sense, but it sure as heck feels like one.

How is Android profit calculated? Does it include the value of the data collected with it? How do you calculate iOS profits? Can you separate the value of the hardware from the software?

Microsoft is making billions dollars of profit from Android's devices just with their patents licensing:

https://blogs.technet.microsoft.com/microsoft_on_the_issues/...