One potential idea - it might be worth looking at overseas manufacturers to see if they can offer a similar display at a better price point. I did a bit of digging on Alibaba, for example, and found a 25" E-ink display with the same resolution as the Boox for around $1000 (and the price goes down to $500 if you order 100 units or more): https://www.alibaba.com/product-detail/25-3-inch-e-paper-dis...
Seems like they offer a color E-ink display option as well, which could be worth exploring.
Note: I don't have any affiliation with the above company, it was literally just the first one I found when searching. I'm sure there are many other options available as well.
That said, the large primary display this uses is $2000. That's very hard to justify for any "normal" household, and that's without any mounts, backend, services etc.
edit: https://github.com/sibbl/hass-lovelace-kindle-screensaver
For example the washing machine. You dont need real time information because you know how long it takes since you've done it 1000s of times and it beeps. All these things are just managed in our heads subconsciously.
Well, it's cool, but the usability of it all is below average.
Declutter your life and don't install any more screens in your home ;)
It's strange that pretty much every weather widget assumes you want to know the current weather conditions and not the forecast.
That said: I seem to get by pretty well with a lowly smartphone so far.
Here is my ~75euros ESP32 eink panel experiment: https://github.com/riston/eink-assist-screen/tree/main