In that case Linux won years ago. Nearly everyone has seen a billboard or mall kiosk or in-flight entertainment system running on Linux, nearly everyone has connected to a web page running on a Linux server, many people run Android-powered TVs. Hell, my dog can push the ice dispenser on my Samsung smart fridge, she's a Linux user too.
Debate's over. If you don't have to know you're using Linux, if you don't have to see yourself as a Linux user, if all you have to do is be exposed to a system that incidentally runs Linux in some odd capacity for it to be considered Linux on the desktop, that's it. Linux won.
Bad news for everyone who is anti-Microsoft but visits Stack Overflow which runs on Windows Server... wonder if those people are aware that they're now considered Windows users?