Dubai is a city in a desert on the edge of the future. Obscenely wealthy and home to the world’s tallest building, the emirate combines modern technology with an aristocrat’s glee in flaunting wealth. Dubai already hasjetpack stuntmen in the sky, camera-strapped eagle videographers on the buildings, and police in Lamborghinis on the ground. How does a city improve upon that? With a drone grand prix, offering a $1 million in prizes, of course.