Greatest tech comeback No. 3: Electric cars
When GM killed the EV1 project in 1996, wails of anguish and outrage could be heard from eco-warriors and nerdy guys from coast to coast. Everyone else? Not so much. Fast-forward to today, when suddenly geeks with cash and clout are driving a Tesla Roadster or Model S -- and if not, they're on a waiting list to buy one, range anxiety notwithstanding. The Tesla may yet become the DeLorean of the new millennium, but it's proof that electric cars are back, baby -- and not just for nerds any more.