Jesse Schell: When games invade real life
http://www.ted.com/talks/lang/eng/jesse_schell_when_games_invade_real_life.html

Tom Chatfield: 7 ways games reward the brain
http://www.ted.com/talks/lang/eng/tom_chatfield_7_ways_games_reward_the_brain.html

David Perry: Are games better than life?
http://www.ted.com/talks/lang/eng/david_perry_on_videogames.html

Jane McGonigal: Gaming can make a better world
http://www.ted.com/talks/lang/eng/jane_mcgonigal_gaming_can_make_a_better_world.html