Source: http://www.joystiq.com/2013/09/25/steam-box-exists/
As a PC gamer and a console gamer, I really don't see who this device is supposed to target. I have no problem playing PC games on my PC, and I'd image that most PC gamers feel this way. People that do not play PC games because they can't play them on their TV are the only people that would be interested in this, and I have to wonder if it is even worth Valve's effort to target these people.