Rumours of the so-called 'Steam Box' – a console-like PC for the living room, powered by Valve's cherished gaming service – have been floating around the Internet for many months now, but that's all they've ever been: rumours. Now, we might just have the kind of evidence we were looking for that the company behind Half-Life and Portal are at least thinking about a PC/Console hybrid, ready to compete with the likes of the PS4 and Xbox 720.