Outside of London is a massive supermarket—one that customers cannot enter. Instead it's dedicated to fulfilling online orders.
Run by the Ocado Group, a company that combines artificial intelligence and robotics with the online grocery market, it's filled with an upper-level cartesian grid swarming with over 2,000 wheeled robots that zoom around in the X- and Y-axes.
Beneath the robots' wheels, each square of the grid is filled with up to 21 milk crates loaded with grocery products.
The 'bots can suck these bins up through their bottoms, then zip them over to the periphery, where additional sorting 'bots pick-and-package them.
YouTuber Tom Scott takes us on a tour of the facility, which has to be seen to be believed: