Interesting. How do you stream stuff to them? Do they have an OS?
Some do, but since he just said "display", maybe with a straight-to-board connection to something like a Pi?
That's the concept, but these are a better experience and funny enough, it was cheaper than a Pi when I bought it. https://m.primal.net/HeKL.jpg
I saw at least on display running Android. But I didn’t check all of them.
Running Android puts you back with the same problems. Software updates and data collection out of your control. I prefer a display with the only software being for basic display settings (color, brightness, etc). It's really just a massive computer monitor for retail displays. But it looks and functions just like a "dumb" TV.
I use a mini PC running Fedor. Specifically, this one https://m.primal.net/HeKL.jpg
No, they don't have an OS in the sense that smart TVs do. They just have the basic software any display has for controlling brightness, color, etc. It's just a good old fashioned dumb TV when you use it like I do. It's incredible how that's a lost concept now. A sign of aging I suspose. Unfortunately, remembering freedom and respect seems to be one of the signs of aging now. Even our TVs abuse us.