Palmer Luckey, 20, wants to give virtual reality a second life. The technology -- gadgets that cover the eyes and create 3-D images -- has been a fixture in science fiction since the 1980s but never took off because real-life devices were scandalously expensive. Luckey, a homeschooled tinkerer, has been working on perfecting the idea for three years, taking cues from today's smartphones. His Oculus Rift raised $2.4 million on Kickstarter. No launch date is yet set.