Maybe I'm looking at things too much from a die-hard desktopper's point of view, but I find this article to be misleading. My major beefs being:
#1 - I have to connect it to a TV? The heck? I didn't see anything like that in Valve's announcement. There's hardly a dime's worth of difference between a TV and a desktop monitor nowadays anyway.
#2 - the part about Linux being lighter than chronically bloated Windows is true, technically, but what's the impact of that? The primary bottleneck in the overwhelming majority of gaming situations today is the GPU, and background processes don't eat that up. The major relief I see with fewer processes comes from tidiness, not performance gains.
#3 - finally: the one thing stopping Linux from taking Windows head on in gaming is the lack of a powerful, practical and ubiquitous platform for developers. Valve is promising to bring just that to the table, but I saw hardly a mention of that in the text.
I know, I know, Tom's Guide is not geared towards enthusiasts, the company's focusing on casual family audiences, yadda yadda yadda. But really, I felt like this article doesn't do justice to what Valve is trying to accomplish.