There's an article on BBC News with a look at the virtual reality headset technology being shown off at CES 2014 in Las Vegas. They look at Oculus Rift's new "crystal cove" units and go on to discuss Valve's interest in this area, saying Valve is releasing an SDK to standardize VR development at their Steam Dev Days conference on January 14-15 (thanks CVG). "Steam is in a unique position to be this intermediary between hardware and software and users," Valve designer Brian Coomer explains. "Without that its going to be hard for any device to get any serious traction." Here's more on the SDK, which will cover other ways developers can control games through Steam, including the Steam controller. He also says Valve is still working on VR hardware, as well: "There's also technology in development at Valve based around head-tracking and headset manufacture and design," he says. "We are working with other companies right now but we have not made any specific announcements."