At the click of a button, an electric car arrives by your feet, but no one is sitting in the driver’s seat. After opening the car door and getting settled in to drive, a female voice says: “Hello, how are you today”? It’s the voice of Antonella Rosa, who drove the Kia vehicle remotely from the Vay Technology GmbH office in Las Vegas’ vibrant downtown arts district. The German start-up has launched what could be the future of car-sharing in the US city. The company is pitching the service as “teledriving,” which involves humans remote-controlling automobiles to get the vehicle to users and pick…