"- Linux is as far from a gaming platform as ever."
I will not make the mistake of claiming that Linux has solved the problem, but this really isn't true. Even as recently as five years ago, if a game was published, Linux either couldn't run it, or required crazy emulation schemes. This list is far better than it used to be: http://store.steampowered.com/search/#sort_by=Reviews_DESC&t...
If Valve wanted to keep pushing Linux gaming, it could probably make it a real thing. My guess is that they won't, because the strategic point of their Linux support was to make Microsoft realizes there is indeed a viable alternative so the rent they can charge is not as much as they were threatening. Plus in the meantime Microsoft got a different CEO who has been much less belligerent. So, lest I sound like a fanboy, my prediction is that you are looking at the high point of Linux gaming right there in that link.
Still... who knows. Having done the work they've done, it may yet be in Valve's interest to keep the threat alive for SteamOS, and a lot of the latest engines are growing Linux support. (When you support all the consoles, all the phones, all the portable consoles, and Mac and Windows, Linux is hardly a huge additional platform to support anymore, especially when you're already supporting Android, which I know doesn't mean you support "linux" but isn't completely irrelevant either.)
But there is definitely stuff that works now, which means that it's a big improvement over 5 years ago. If you like this is far more about how the situation was utterly hopeless 5 years ago than how it's heaven-on-Earth now.