It would be quite awful if the supposed durability of miniLEDs would turn out to be an environmental disaster for chemical leaching (due to the number of LEDs) and microplastics.
The amount of plastics in a display panel is much less than the amount of plastic bottles most people go through in a week or less. Yes, every little bit contributes, but you need to focus efforts on the impactful sources first .
Burn in is a very serious issue with OLED as well as overall lifespan due to the organic nature of the diodes. uLED is probably a better technology for a variety of applications that have to factor those issues in.