nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq0gsym5c2vm5gme939yz8qfs4rmksc29vpf6g3hp0xrj9sgjfjn8qamzn9d (nprofile…zn9d) Maybe Sharp "memory-in-pixel" displays? https://www.sharpsecd.com/#/memory-in-pixel-lcds-product
They're not as reflective as proper microball e-inks but they're not bad at all (plus they can be updated relatively quickly).