Presumably taking it off the wall, first?

I don't claim that e-ink has no use case, only that it's bad at displaying photographs. If you mean to argue otherwise, please do so with respect to statements I've made, rather than to ones I have not.

I was addressing the contrast ratio, which people seem to sort of measure inadequately in sunlight.

There are two comparisons between LCD displays that should properly be referencing S/N ratio instead of contrast.

With a glossy display, whatever is behind you STRONGLY affects your S/N ratio, especially in black.

In sunlight even a very bright LCD is washed out almost to unreadability (though I am surprised how well recent phones still manage to still function)