I see, I would point out that for production work you are very unlikely to be running the latest release of any video driver due to it being largely untested in

I see, I would point out that for production work you are very unlikely to be running the latest release of any video driver due to it being largely untested in the wild, no matter if you run Linux or Windows. So the official SteamBox will come with very stable drivers for it's hardware configuration, and the same goes for third-party 'Steamboxes' aswell I'm sure. For Steam users running on their own machine configurations it's another thing of course, but that's no different from the way PC gaming has always been. One possible difference is that the official Steambox will likely function as a 'confirmed' hardware configuration so even if you 'build you own machine' or look to buy another offering you can use the hardware setup of of existing Steambox(es) as a hint of what to buy for the best 'Steam-experience'.