The desktop has been losing market for a while. I feel Windows is already under serious threat (if not already in the minority) when you think about all the devices that mainstream audiences orbit around (phones, tablets, portable consoles, etc), often using the Linux kernel. Only about a third of most website traffic comes from desktops.

Many of the people who frequently use Windows desktop do so because of their job, and often avoid using it outside of work as much as possible, since it feels like… well, work.

Microsoft has been desperately trying to try to appeal to those other bigger sectors of the pie and has failed every time.