Ultra-luxury automaker Rolls-Royce debuted its self-driving concept car this week, called the 103EX, and it looks, well, odd. It’s nearly 20 feet long and 5 feet tall, and has some — interesting — features. See for yourself: The futuristic-looking vehicle seats two passengers on a silk-covered sofa in the car’s “Grand Sanctuary,” or interior cabin. Instead of a steering wheel, you get a see-through glass display screen. The engine is at the rear of the car, and there are luggage…