The simple fact is that Linux has changed the world and been a tremendous success outside the desktop, and there is nothing wrong with that. Android is hardly the only Linux-based platform that has made a big mark. Linux is huge on servers, in embedded technology, and is a constant prompt for innovation on emerging platforms. Ubuntu is the most popular platform for building OpenStack deployments on. Supercomputers all over the world run Linux, and Chrome OS is based on it.
So Linux is making a huge difference globally, and it is time for detractors to stop focusing exclusively on its status on the desktop.