2. Nolan Bushnell

For decades Nolan Bushnell, the originator of Pong and ATARI, has pushed the boundaries with inventions that were sometimes a bit ahead of their time. After amassing a personal fortune by selling ATARI to Warner Communications, Bushnell focused his attention on his rapidly growing Chuck E. Cheese pizza parlor chain and backed a series of innovative inventions, including in-car navigation systems, online shopping and robots. The sometimes-controversial father of the video game industry finally returned to the business with his current company, uWink