Multiple companies have outlined plans for flying taxis, but Boeing just took an important step toward making them a practical reality. The aircraft maker has completed the first test flight of its autonomous electric VTOL aircraft, verifying that the machine can take off, hover and land. It's a modest start, to put it mildly -- the taxi has yet to fly forward, let alone transition from vertical to forward flight modes. That still puts it ahead of competitors, though, and it's no mean feat when the aircraft existed as little more than a concept roughly one year ago. When finished, the vehicle will serve as an "urban air mobility" solution that shuttles passengers across town in situations where ground transportation would be slow or impractical, with a peak range of 50 miles.