Someday, the word driver will connote something completely different than it does today. When cars are fully automated and don't need us for anything more than letting them know where to go, the job of a "driver" will be like that of a patron in a bar selecting a song on a jukebox. But that scenario, where the passenger cabin is a rolling lounge in which all occupants are free to talk, entertain themselves with electronic gadgets, or sleep, is still decades away. Until then, even the most sophisticated self-driving car will occasionally encounter a circumstance that overwhelms its computerized smarts. At those moments, it will look to a human to take charge.