The way I see it. Something they can work for on and off by the next expansion(I mean looking at it they already worked on ps4 and the mac client before a single expansion). Depends how the code could be easily ported. And yes as a GNU/Linux user myself I would support something like this by buying it - even though I play on ps4( because SE made a great controller interface and I want others to use it as well for RPGs on consoles).

And yes steam boxes would be a vaild target for this.