Valve's new Hardware!

Valve's recent change in Job listings has everyone talking about how Valve is making a system! This is very cool, and I think it's going to be a huge success. The job listing is aimed at finding someone with a background in "product design and manufacturing, ergonomics, usability, aesthetics, and surfacing," The post goes on to say list Valve as "traditionally a software company" but then says "we're frustrated by the lack of innovation in the hardware space though, so we're jumping in." Obviously specific goals aren't mentioned, but we are probably going to see revisions of basic things like mice and keyboards. So what is Valve's mystery system (a.k.a. the Steam Box)? Only time will tell.