Robots came into the world as a literary device whereby the writers and filmmakers of the early 20th century could explore their hopes and fears about technology, as the era of the automobile, telephone and airplane picked up its reckless jazz-age speed. From Fritz Lang's "Metropolis" (1927) and Isaac Asimov's "I, Robot" (1950) to "The Terminator" (1984) and "WALL-E" (2008), and in countless iterations in between, they have succeeded admirably in their task.
Since moving from the page and screen to real life, robots have been a mild disappointment. They do some things that humans cannot do themselves, such as exploring Mars, and a host of things that people do not much want to do, such as dealing with unexploded bombs or vacuuming floors — there already are around 10 million robot vacuum cleaners wandering the carpets of the world. They are useful in some areas of manufacturing.
However, reliable robots, and especially ones required to work beyond the safety cages of a factory floor, have proven hard to make, and robots are still pretty stupid. So, although they fascinate people, they have not yet made much of a mark on the world.
That seems about to change. The exponential growth in the power of silicon chips, digital sensors and high-bandwidth communications improves robots the same way it improves all sorts of other products. Three other factors are at work, however.
One is that robotics research and development is getting easier. New shared standards make good ideas easily portable from one robot platform to another, and accumulated know-how means that building such platforms is getting much cheaper. A robot such as Rethink Robotics' Baxter, with two arms and a remarkably easy, intuitive programming interface, barely would have been conceivable 10 years ago. Now you can buy one for $25,000.
A second factor is investment. The biggest robot news of 2013 was that Google bought eight promising robot start-ups. Rich and well led — by Andy Rubin, who masterminded the Android operating system — and with access to world-beating expertise in cloud computing and artificial intelligence, both highly relevant, Google's robot program promises the possibility of something spectacular, though no one outside the company knows what that might be.
Amazon, too, is betting on robots, both to automate its warehouses and, more speculatively, to make deliveries by drone. In South Korea and elsewhere companies are moving robot technology to new areas of manufacturing and eyeing services. Venture capitalists see a much better chance of a profitable exit from a robotics start-up than they used to.
The third factor is imagination. In the past few years, clever companies have seen ways to make robots work as grips and gaffers on film sets — "Gravity" (2013) could not have been shot without robots moving the cameras and lights — and as panel installers at solar-power plants. More people will grasp how a robotic attribute such as high precision, fast reactions or independent locomotion can be integrated into a profitable business, and eventually some of them will build mass markets. Aerial robots, aka drones, may be in the vanguard here. They will let farmers tend their crops in new ways, give citizens, journalists and broadcasters new perspectives on events big and small, monitor traffic and fires, look for infrastructure in need of repair and much more besides.