If there is one metanarrative that can sum up the era we are entering in terms of the impact of technological change on society, it’s extremes – new technologies that are prepared to change society come with both much higher upsides than most technologies have in the past, as well as much lower downsides.

Let’s take three, in order of present, near-future, further-future.

First: vehicles piloted by software or by humans remotely. We are already somewhat here, with drones in the air and self-driving cars creeping closer. The upsides to these technologies are tremendous – an end to traffic congestion and vehicle-related deaths, same-day delivery of anything, cheaper commercial airfare, and boundless other changes unimaginable to us.

It also means robot armies and spies, ie, vast reductions in the marginal cost (economic and political) of slaughter and snooping.

Second: 3D printing. The great leap to the world of instant satisfaction, universal artisanship, the Star Trek economy.

It also means every home is a potential arsenal.

Lastly: nanobots, ultra-tiny ultra-sophisticated drones. It means amazing geological and astronomical exploration, as well as a revolution in medicine – imagine “Body Wars” come to life, tumors and blood clots eliminated in seconds with no pain and minimal costs, strokes and punctured lungs repaired. Average age skyrockets.

It also means invisible untraceable assassins and an end to any presumption of privacy.

This is the future, folks.