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Some are comparing their display tech to Pebble, which was so threatening to the growing smartwatch market that Fitbit purchased the company and (for reasons I don't know) took all their IP and shelved it. I wonder if Daylight will be able to keep their mission when Amazon comes knocking

Happily they’re a public benefit corporation

I agree, refresh rate is an issue that is more important than energy usage, colors or life time (apparently e-ink dies quicker when viewing videos).

I'm just experimenting with a USB-based external e-ink display to see if it is capable of reading/writing/editing technical documents (started last week), using a device with a 50% more affordable price point. My first impression was I needed to increase the font size to be able to work. Let's see how it goes.

Video forces e-ink screens to redraw the scene 30 times per second. For static text like an ebook, the display redrawing the scene far less frequently, maybe once every 30 seconds, if that's how long it takes to read a page of text.

Images look terrible on e-ink, so that's an issue as well.