You most likely don't want such a device at home: it likely makes quite a lot of noise, takes quite a lot of space, and is not really useful as an individual. Its use-case is more for a public/semi-public space, for a group of people to see.

I think you have not watched the presentation video and even the dedicated "use case" for home at their site. They are very much advertising for home use as well. https://www.vestaboard.com/home

They can market it for home, but that doesn't mean it's practical or useful in the real world

I can see rich people buying this as part of a high-end room decoration. Probably cheaper than a hand-done painting of the same size.