I’d like to begin with a story.
I was born in the UK — in Birmingham — although obviously I don’t have the accent! My parents came from Hong Kong, but we didn’t visit it until I was a few years old, since it’s quite the trip for any family.
The approach to the old Hong Kong airport in Kowloon Bay is hair-raising. You descend between skyscrapers, so close that you can practically see inside their windows. We were staying with relatives near the airport, which was fun, if noisy.
Me and my brother did the rounds of our aunts and uncles and grandparents, but eventually it was time for my parents to see their own friends. We were left with our cousins and the world’s greatest collection of pirated Famicom and Sega Megadrive videogames.
Now, these cousins. Their great aunt Agatha lived with them. As I was told it, she’d travelled the world, sailed the seas, fallen in love with all sorts of people, and made her fortune. Now in her eighties, she was still as sharp as a tack, with photographic memory and a wickedly funny tongue.
Agatha couldn’t easily walk any more, so more often than not, she’d sit in her armchair in the corner, situated just so she could see the whole living room and kitchen and hallway, and watch everyone coming and going. She wanted to know what was going on in the home, but more importantly, she wanted to be useful — and she was.
If you were on your way out but you’d forgotten to get pick up your keys, auntie Agatha would remind you (very loudly). If you were looking around for a letter or book you’d misplaced, she’d know precisely where you’d left it. She’d even watch you while you were doing your chores and tell you just which spots you’d forgotten to dust. Her job, as she saw it, was to help the household flourish, and keep them safe.
I’m sure some of you have figured out where I’m going with this. Almost forty years later, we all have auntie Agathas, watching over us in every room of our homes.
Today, in 2027
8 out of 10 households in the UK and US now have multiple home cameras. It’s one of the most astonishing success stories in the history of technology, with an adoption curve almost as impressive as smartphones in the previous decade. But unlike smartphones, we’ve bought many more than one per person.
What fuelled the rise of home cameras? Let’s start with the devices themselves.
Why did the home camera revolution only begin in 2018 and not earlier? Fast and cheap internet was an essential condition, allowing owners to monitor their homes on the move and abroad. Another boost came from the ‘smartphone dividend’, which reduced the price of camera components.
But beyond 2018, two technological revolutions fuelled the rise of home cameras: charging and sensors.
Nowadays, it’s hard to believe that almost all home cameras in the mid-teens were wired. These cameras had no batteries and had to be tethered to a power outlet at all times, constraining their placement within homes and generally causing an unsightly mess.
From 2018 to 2023, home cameras adopted batteries lasting one week to one month — a massive improvement over tethering, as they could be mounted anywhere, including outdoors and in bathrooms — but arguably more irritating than wires, as their “low-power” chirping became a frequent sound in many homes.
It wasn’t until the full rollout of resonance charging, or more broadly speaking, ‘charging at a distance’, that cameras truly permeated every room and corner of our homes. Freed from the need to be wired or retrieved every month, and completely weatherproofed, they were stuck in the corners of ceilings, thrown onto roofs, hung on walls, mounted on gates, and balanced precariously on shelves. Providing they remained within range of a resonance station, they could be placed and forgotten for years.
The improvement in the sensor capabilities of home cameras has been even more extraordinary. In 2018, most cameras had a laughably-named ‘high-definition’ resolution of 1920 x 1080 — barely enough to distinguish small objects across a room. Matters were soon improved with the introduction of ‘High Speed 4K’ sensors that could examine minute changes in skin bloodflow to monitor people’s heartrate and emotional state. Soon after, cameras reached beyond the visible spectrum to infrared and ultraviolet, essential for home security and health applications.
It wasn’t until the introduction of multipath LIDAR in 2024 that the supremacy of cameras in our hearts and homes was assured. Various primitive forms of LIDAR had been present in earlier cameras, as an aid to home VR and augmented reality through precision depth mapping and 3D positioning. Multipath LIDAR, however, multiplied the reach of our cameras by using reflections to see around corners into other rooms; to interpolate new camera angles; and to even see inside objects. It finally provided total awareness of all objects within a home, without the need for excessive numbers of cameras.
In fact, the most advanced multipath systems now pose a threat to the business model of the camera manufacturers who’ve emphasised quantity over quality. Now that a single camera can take the place of many, it’s likely that overall camera shipments could begin falling.
Enough about technology — why did people invite cameras into their homes, and what did they use them for? I’ve identified five broad applications, in rough chronological order: Continue reading “When Surveillance Goes Private: A 2027 Retrospective”