Revealed at this year's Geneva Motor Show, the Audi R8 e-tron is already a technological tour de force. Its combination of battery-powered range and speed is equalled only by the Tesla Model S. At the inaugural CES Asia show, Audi made the R8 e-tron even more high-tech, rolling its autonomous driving suite into the electric coupe. The R8 e-tron piloted driving concept can unleash 456-hp worth of performance on the street ... without a driver stepping on the pedal.