Seems like you're proposing an environmental disaster.
...and even that may not be. I only say that it might, because I have a credit-card sized (it looks identical to a credit card - same size, same thickness) device from my bank, that was given to me as a customer for generating a 2-factor authentication number. The number is displayed as a set of 6 7-segment digits on such a display. I've had it for over 15 years, and it is still running off its original battery.
That said, I've never seen such a display which was larger than what is on my card, nor one that had color (the one on my card is a "greyish-green" color). Plus the displays are very slow to update (but, like e-ink displays, they don't need power to retain the image - at least in the short term; over time, the numbers on mine "degrade").
But supposedly, when the card's battery is "used up", and the card no longer works, you're supposed to cut it up along certain "lines" printed on the back of the card, and throw it in the trash. I doubt that it is biodegradable, but it might be recyclable.
Few decades later this will fall off from reality, of course (if we'll still retain the strict sense of reality then at all).
Upd: supporting your point, I suggest all people here evaluate buying this thing vs. buying a tablet with only two functions: view gallery and view image (and seamlessly download these from fixed photostream that you can post to as a remote contributor).
Step 1: Have the idea.
Step 2: Implementation.
We're already half way there!