Android might run on Linux kernel, but that is a minor detail to userspace, and might be on the roadmap to be replaced by Zirkon.
So no, it wasn't won anything besides server room.
That is more due to how OEMs lock out non-windows OSes from running on their hardware. If users were given a choice, the "windows tax" alone would be enough to convince people to give linux a try, particularly in the low-end segment.
* Android is technically linux, but typically smartphones are locked in.
* All apple products are notoriously locked in.
- Linux is an implementation detail in Android, isn't exposed to userspace (not part of Java/NDK official APIs), Treble made it even less upstream like and who knows, it might even be replaced by Fuchsia's Zirkon
- Apple products being locked in doesn't have anything to do with laptops and 2-1 devices being the future desktops
Screen rotation, pen support, virtual keyboard, they're all there and get the job done. The only thing that doesn't happen out of the box is that my keyboard remains activated when I switch to tablet mode.
I'm having way more issues with proper scaling on my 4K screen than I do with the 2-in-1 support.