Surely this tech must have downsides, otherwise Apple would already be using it in the Watch, given its low power usage. Since you proposed it, have you looked into what its downsides might be?
I don't know much about electronic paper myself (E Ink is just a specific brand), but I believe two of the issues are mediocre color saturation and low refresh rate. For the latter, E-ink's recently-released Gallery 3 Color Paper has refresh rates of 0.75 s – 1.0 s in standard color mode, and 1.5 s in best color mode. That's too slow for an interactive device, even if you're not watching videos or playing games.
I'm also wondering how efficient electronic paper would be if it actually had OLED-like refresh rates, since the reason electronic paper is so efficient is that it only draws power when it changes. So if it was refreshing much more quickly, that would increase its power draw.
I would expect Apple is looking into this tech, because its low power draw is very appealing, but it may have a ways to go before it can be used in a watch. Accoding to Ross Young, the next upgrade to the Apple Watch's OLED display will probably be micro-LED. While micro-LED may not equal electronic paper in power draw, it will give a significant boost in efficiency over OLED.
This is confusing. E Ink just announced the Kaleido 3 color e-paper at the beginning of the month, and now comes up with E Ink Gallery 3 color e-paper.
www.cnx-software.com
Apple is set to make an upgrade to the Apple Watch display technology as soon as 2025, according to a...
9to5mac.com