They have a desktop OS and they have touch layer.
There's no reason to think either will move to a closed desktop OS.
The first is that fully automatic memory management will eventually be an expected feature of the primary application development environment for a desktop OS.
It had a number of attributes that are still unique in a desktop OS.
Despite all advances of Linux it doesn't seem to be able to become a good desktop OS.
I'm not seeing a problem with some form of Windows - it doesn't need to be a full-blown desktop OS.
Apple's desktop OS is on its way out any day now!
On a desktop OS without sandboxing, this vulnerability is much more severe.
Linux isn't a great desktop OS yet but on phones it has serious potential.
Right now, there is a mistaken belief that Linux will never be a desktop OS.