Nintendo dominate the hand-held market. While they technically do fight Microsoft and Sony, and battle against mobile gaming, they’re currently the only option for a proper hand-held console. That reign of power, though, is finally being challenged, not by Microsoft or a returning Sony but rather by Valve, the dominant force in PC gaming. A company with plenty of resources to throw at any project it fancies, stepping into the market and trying to expand PC gaming in a whole new way. Valve are aiming to do something dramatic, something big and something very exciting. Can it succeed?