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As the person you are replying to clearly stated, it has nothing to do with drawing power from a wall socket. It’s about enabling new uses that work on battery power that can last for months/years instead of minutes.

I see now that my perspective was too bound to the context. Thanks.

Many of e-ink's use cases involve low power environments. This is often due to logistics - not cost.

I'd love big reflective/tranflective display but I'd imagine because of rarity the prices would also be pretty high