Driverless cars may be just around the corner, but the first time a driverless car runs down a pedestrian the courts will be so full of lawyers you won't be able to breathe. It would also require that cars receive aircraft standards of maintenance and certification, no chance of running a ten year old banger. Driverless train technology has been around for decades and yet every high speed rail line still has drivers. If aircraft were to be remotely piloted how long would it be before someone hacked into the system and crashed it?