Unlike VR goggles like the Oculus Rift, putting on the Cast AR doesn't cocoon you in another world.

ENGADGET

Whereas VR goggles immerse a user in a computer-generated environment, AR uses semi-transparent goggles, which overlay computer-generated graphics onto a user's view of the physical world.

CNN: Turning virtual visions into reality

The soldier being treated wears VR goggles and headphones.

NPR: Virtual Reality Therapy for Combat Stress

Game Developers Conference 2013 organizers have announced the recent addition of two talks from Valve that discuss porting Team Fortress 2 to VR goggles - plus research and development challenges for head-mounted displays and tracking systems.

ENGADGET: Stay seated: Valve's Team Fortress 2 ported to virtual reality