The big feature I'd heard about dealt with sound immersion. The headset already tracks your movements and adjusts what you're seeing accordingly, but now there's also support for 3D sound. The example I heard was about two robotic arms engaging in a sword fight. As they move around you, you hear the audio accordingly... but if you look to the left or the right, the sounds adjust as well, to remain consistent. It's just one further level of immersion that sounds pretty neat.