Once the subject of science-fiction films and even of dreams, flying electric cars and self-driving vehicles may be here sooner than we think. Various tech companies are already experimenting with systems that will let cars drive without human intervention. We don’t have fully-autonomous vehicles yet, but there are already those that have semi-autonomous features. An article by autobytel.com reveals that there are, for instance, vehicles that have adaptive cruise control, which maintains a minimum distance from the car in front – slowing down if too near and speeding back up when safe; automat…