Google has already stated that it's desktop OS of choice is Ubuntu LTS, which happens to be the worlds most popular open-source OS.
Steam is currently developing a Linux based OS for their upcoming Steam Machines.
Sure more users use Windows, but that is purely because of how easy it is. Stop acting like Linux isn't a good OS just because not as much software is made for it. If something isn't compatible with Linux, Linux can easily become compatible with it.
And before someone pulls the "emulators aren't perfect" excuse, that is almost always the fault of the program itself.
At the end of the day, Linux is only unpopular because it is difficult for the average user to operate. But if you take the time to learn how to use it, it can do some amazing things.