[drill_sarge]

It does not state on what drivers/other stuff they are contributing. It sounds they work together with the vendors to improve the proprietary drivers, I think. That would be zero benefit for GNU/Linux environment. Also current state of Steam OS is just a standard Debian with proprietary components added. And those components are what really matters in this field. I do not expect that Valve make their Steam Client open source, but at least not relying solely on closed stuff for the relevant parts. In the current state this doesn't improve anything or makes somehow the "ecosystem" better.

[clarry]

There was some recent quote about Gabe saying something along the lines of "open source is the future of gaming". I wouldn't be one bit surprised if that were bull though. In fact a less literal but more likely interpretation of that is "in the future we'll exploit (more) open source for our own benefit."