I'd argue in this sense, Windows won: it was never bested by Linux on the desktop, even though it is now largely irrelevant.
And what made it irrelevant? The web, a collection of open standards and protocols.
And what made it irrelevant? The web, a collection of open standards and protocols.
In some ways, yes, the choice of operating system is now largely irrelevant - if you mainly use web based stuff. But then again, walk into any corporate office in the world and there is a massive, massive probability that the only operating system you will see on desktops is Windows.
It may not be a Facebook clone built in a distributed fashion that forces Facebook to open up, it may instead be a whole new approach to social applications that nobody's thought of yet. That's fine.