Valve has confirmed that it will release a software developer kit that will allow developers to work on a standard interface for virtual reality games in order for players to enjoy a seamless experience across devices and games, BBC has learned. The kit will be released at Valve’s Steam Dev Days conference that will take place in mid-January in Seattle. At CES 2014, the company and its partners have unveiled no less than 13 Steam Machine console prototypes, although neither one comes with virtual reality features. The kit will be part of a broader software tool that will let developers create a standard interface for Steam Machine games as well, Valve designer Brian Coomer revealed. Apparently Valve spent a lot