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Micro LEDs.
Consider an OLED, but no drawbacks, lower power consumption and no burnin. Already available but currently extreme expensive. (Samsung in korea sells one if i recall)
Solid state batteries.
More range on electric cars. Faster charging. Lower (or no?) Risk of fire, if poked. (Reminds me of the old subreddit “spicypillows”). Supposedly arriving in toyota cars by 2027.