Android eink tablets already exist, have done for years. It’s expensive and doesn’t work as well as you want. The eink company owns patents that keeps everything expensive.
See, I don’t want a tablet. Tablet implies fast refresh rates, minimal ghosting, fast processor, etc.
It’s a different purpose than a screen I can stick on a wall and only look at a few times in the morning. That lower quality on the panel and hardware should bring costs on the tech lower.
Hell, I don’t even really need 8 shades of color.
If someone can stick a low power processor on there and make it run on some rechargeable AAAs, even better.
It’s the display that is prohibitively and arbitrarily expensive. None of the other variables matter since all of the low power / retain image advantage is solely because of that display.
And large e-ink displays will remain niche, simply because of the company’s pricing.