Did Black Mirror: Playtest come true?

1. PLAY-1

   A small neck implant lets a company write convincing, fully immersive experiences straight into a person's senses, indistinguishable from reality.

   FARCore premiseEst. 2090 · range 2060–2150+Confidence: low

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   Weight 5/5 · Core premise: the mushroom implant is the story's engine and its twist.

   Brain implants are good at reading and poor at writing. Researchers have decoded imagined sentences from the motor cortex of four paralysed people with up to 74% accuracy, and Neuralink's Blindsight, which stimulates the visual cortex to produce an image, is experimental, with early resolution expected to be low. Nobody has shown a device that produces coherent multi-sense scenes, let alone a house, a person and a spider at once. The path needs both read and write access to many brain regions without surgery. The range is wide because this may never be built. 123

2. PLAY-2

   Augmented-reality games that place interactive characters and targets into the real world are a mass-market product.

   ARRIVEDSupportingArrived 2016Confidence: high

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   Weight 3/5 · Supporting: the Whac-A-Mole warm-up sets up the technology and its menace.

   Location-based augmented-reality games reached mass scale in July 2016 with Pokémon Go, three months before the episode aired. It had passed 600 million lifetime downloads by November 2022. These games run on phones, not implants, and they overlay the world instead of replacing it, so they differ from the episode's seamless version. 45

3. PLAY-3

   A horror game uses a neural network to learn each player's particular fears and builds scares from them in real time.

   ARRIVINGMajorEst. 2032 · range 2028–2045Confidence: medium

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   Weight 4/5 · Major: the personalised scare engine drives the whole test and Cooper's ordeal.

   Games that adapt to a player's stress have been on sale since Nevermind launched on Steam in September 2015, using heart-rate variability to make the game harder as the player grows anxious. What exists responds to arousal, not to the content of a person's fears. A pulse sensor shows that someone is stressed but not why. Learning an individual's specific dreads and generating matching scares needs better sensing and generative software, which are both advancing, but no commercial title does it yet. 678

4. PLAY-4

   An ordinary phone can disrupt an implanted electronic device, with dangerous results.

   ARRIVEDSupportingArrived 2021Confidence: medium

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   Weight 3/5 · Supporting: it is the mechanism of the ending, but the plot turns on the implant.

   In May 2021 the FDA said that magnets in some phones and smartwatches can put certain implanted devices, such as defibrillators, into a mode that suspends normal operation, and advised keeping them six inches away. The cause is a magnet, not a radio call as in the episode. The agency judged the risk to patients to be low and knew of no adverse events, and a 2022 cardiology commentary called the risk overstated. We rate it ARRIVED as a documented effect, not as a common hazard. 910

1. FOR Scientists decode inner speech from brain activity with high accuracy. News-Medical (reporting Cell, 14 August 2025), 2025-08-14. Implants in four people with ALS or brainstem stroke decoded imagined sentences with up to 74% accuracy; the team added a password so inner speech is only read when the user allows it.
2. CONTEXT Neuralink says the FDA designated its Blindsight implant as a 'breakthrough device'. Engadget, 2024-09-18. Blindsight is meant to restore sight by stimulating the visual cortex; the device is experimental and the article calls the company some way off from restoring sight.
3. AGAINST Inner speech in motor cortex and implications for speech neuroprostheses. Cell, 2025-08-14. The paper's own limits: decoding free-form inner speech remains error-prone, and it reads a narrow task from a handful of participants. Reading signals is far easier than writing a world.
4. FOR Most downloaded iPhone app in its first week. Guinness World Records, 2016-07-01. Pokémon GO, Niantic's augmented-reality game, launched on 5 July 2016 and Apple said it had been downloaded more than any other app in its first week.
5. FOR Pokémon Go has passed 600m lifetime downloads, nears $4.7bn revenue. MobileGamer.biz, 2022-11-03. AppMagic figures: over 600 million lifetime downloads and almost $4.7bn revenue after six years.
6. FOR Nevermind, the World's First Biofeedback Horror Game, Has Launched. Just Adventure, 2015-09-30. The full game launched on Steam with support for pulse sensing; higher stress makes the game harder, and it can be played without sensors.
7. FOR The body language of fear: fearful nonverbal signals in survival-horror games. DiGRA 2015 (Lancaster University), 2015-01-01. In a study of 16 players, frightening game events were clearly reflected in physiological signals, though body movement was an unreliable guide.
8. AGAINST Keep Calm and Play On: Video Games That Track Your Heart Rate. MIT Technology Review, 2015-09-21. Describes Nevermind, and notes that heart-rate sensors show that a player is stressed but not why.
9. FOR Magnets in Cell Phones and Smart Watches May Affect Pacemakers and Other Implanted Medical Devices. US Food and Drug Administration, 2021-05-13. FDA testing confirmed some products can trigger magnet mode, which can stop a defibrillator detecting a fast heartbeat.
10. AGAINST Cardiac Implantable Electronic Devices and Consumer Electronic Devices: The Proof Is in the Front Pocket. Journal of Innovations in Cardiac Rhythm Management, 2022-07-01. A commentary judging the risk overstated: real-world cases are limited and distance matters a great deal.

Ledger updated 6 Nov 2026. All works on the P(n) Board · Method