The Ehang 184 is a Chinese-produced taxi drone that has begun tests in Dubai of trips up to ten miles long. When it arrives on the market, each one will probably cost its private hire operator between $200,000 and $300,000. But prices fall almost as fast the technology improves. According to Paul Rigby, the CEO of Consortiq, a drone consultancy firm, you can now buy for £500 a drone with capabilities that in an equivalent model five years ago would have set you back £10,000. In five years’ time, Rigby says, there’ll probably be drones that can carry a person two hundred miles before the batteries need to be recharged. Uber foresees a day when a 50-mile drone taxi flight from the São Paulo suburb of Campinas to the city centre will cost the equivalent of $24. Refugees who can afford it currently pay thousands of dollars to escape war zones and make the uncertain journey to a place of greater safety in Europe. In the future, perhaps some of them will be able to travel by drone.