I’ll be watching this closely as I love working outside. My current arrangement is to use a Boox 13.3 inch e reader in HDMI mode. It works but it is a rats nest of cables.
A purpose built laptop with a e paper screen is a dream I never thought would come true because the market is so niche. I don’t even need video playback. Fingers crossed. Only 1241 responders on a 50,000 target market survey, I won’t get my hopes up.