I have always been a big linux guy, (especially on servers).
Most people don’t seem to realize that Android IS Linux. I don’t have to explain how they have taken over the smart phone market, (certainly in terms of market share at around 75% worldwide, last time I checked). For people who aren’t aware, Linux is an OS kernel with a GUI (also known as a distro) wrapped around it (of which there are many choices).
My personal favourite is Ubuntu. (They seem to have the most interesting strategy and best potential to take over everything):
Linux has already quietly conquered the mobile phone, and the server market. Next are tablets and then eventually the desktop.
They will also be running the car industry:
and the cloud, which is increasing in importance:
(This is the next generation operating system for the cloud)
Nothing short of world domination, as afar as I am concerned.