Like the smartwatch, the much-heralded drone is one of those gadgets that, we are told, is going to transform our lives. Before long, the boffins would have us believe, our groceries, Amazon orders and even pizza will be delivered by these little unmanned mini-choppers, while police will be able to keep a beady eye on potential criminals with buzzing eyes-in-the-sky.That's not to mention the more serious applications in the pipeline, from disaster relief to monitoring severe weather. But until now, outside of a war zone we've seen little evidence that drones are catching on. Possibly because the things are so difficult to fly.However, a farmer in Ireland seems to have hit upon a successful real-world use for the remote-controlled "quad-copter".Paul Brennan from Carlow has shown the flying machine is remarkably good at herding sheep.Footage of the drone, named Shep, in action was viewed more than 80000 times in two days on YouTube at the weekend. ..