Oculus' John Carmack Explains Virtual Reality in 5 Levels of Difficulty

The technology behind modern virtual reality is rapidly evolving, but what exactly helps create a better sense of realism and immersion? WIRED has challenged Oculus CTO John Carmack to explain the concept of realism in virtual reality to 5 different people; a child, a pre-teen, a college student, a grad student and a VR expert.