Ow my eyes!
I remember when i was a kid Virtual Reality was all the rage, the whole thing was cumbersome, expensive with terrible graphics, and vomit inducing, so never took off. It looks like it's making a comeback and I'm excited :)
John Carmack the grandaddy of first person shooters and founder of Id Software, has been working on bringing VR bang up to date, with the Occulus Rift. In his keynote speech he gives a very scienfic explanation of why VR failed in the past and what he's been working on to get it back on the scene.
Loved the part where he beamed freakin lasers into his eyes! FOR SCIENCE!