Sharp's Memory LCD comes pretty close. It's a high contrast LCD with a reflective back layer that mimics paper and has very low power consumption. But I believe

Sharp's Memory LCD comes pretty close. It's a high contrast LCD with a reflective back layer that mimics paper and has very low power consumption. But I believe it's only available on small sizes, and it's a one-bit display (no greyscale). This screen is used in Panic's Playdate game console as well as the Pebble smartwatch. https://sharpdevices.com/memory-lcd/#1615975689583-4d044034-56d122b6-23f8 https://sharpdevices.com/memory-lcd/#1615975689583-4d044034-... https://www.adafruit.com/product/4694 https://www.adafruit.com/product/4694