THE ULTRARICH won’t settle for an Uber to the airport. Renault’s EZ-Ultimo concept car, which is essentially an executive lounge on wheels, was dreamed up with the jet set in mind. The fully autonomous all-electric vehicle is spacious, but is meant to accommodate no more than three passengers. The 600 diamond-shaped glass tiles between the body panels and the panoramic glass roof act as a giant oneway mirror that lets riders look out on the world while maintaining their privacy. EZ-Ultimo shares some traits with Renault’s earlier self-driving concept vehicles—the EZ-Go for ride sharing and the EZ-Pro for delivery fleets—but the automaker is mum with regard to the particulars of the car's power train and self-driving abilities.