Hailo is an interesting business because drivers tell you that already 7,000 of the network of 23,000 cabs are using the service. But it's very much on their own terms. Want to pay cash for a cab in the middle of the day? A driver will pull up in two minutes. Want to pay by credit card in the evening the app often struggles to find a single taker.
It's a Friday afternoon and you've left the office after a busy week. You hail a driverless cab, powered by nuclear fusion, that takes you to a sub-orbital spaceship which in turn flies you up to a space hotel for a well-earned weekend break away from it all. What you might think belongs to the realm of science fiction could be a reality in 100 years' time.