Couldn't one use an old iPad for something similar?
I have this idea for some time: a simple SaaS where you create widgets (News headlines, Weather, Stocks, FX rates, Clocks, etc) in your account, then load a special page optimized for viewing on tablets from a few meters away, which is updated periodically.
Then you can find another cool use for old iPads by pointing them to this page, and mounting them on the wall.
You kinda can, but there are no 32" iPads and none will look like E-Ink.
The closest I think you could go for is to have a monitor with precise brightness control and measure the wall brightness and adjust the monitor brightness to fit. Something like this was posted once and I'm sure it was done by more people, but here is an example: https://www.claybavor.com/blog/a-canvas-made-of-pixels
The point of e-ink displays is that they only use power when changing what's displayed or refreshing, so they can stay on the wall for several months on just a small battery. And they look more like paper.
I have this idea for some time: a simple SaaS where you create widgets (News headlines, Weather, Stocks, FX rates, Clocks, etc) in your account, then load a special page optimized for viewing on tablets from a few meters away, which is updated periodically.
Then you can find another cool use for old iPads by pointing them to this page, and mounting them on the wall.