Ask HN: What's a programmable display which is not a screen?

I'm a software dev who's interested in a programmable display for my kitchen. Something to show train schedules, to do items, calendar events, etc.

Since screens are already so abundant, I'd like to use something which does not have a screen.

After much thought the only thing I could come up with is a Split Flap Board. There is a company making them but it's cost prohibitive (smallest ones are over 5K).

What are some programmable displays which are not screens?

Split flap boards https://www.oatfoundry.com