Very cool. I love seeing things like this being made. Some others from the past few years:
https://techcrunch.com/2017/05/05/blindpads-tablet-makes-vis...
https://techcrunch.com/2018/01/18/the-becdot-is-a-toy-that-h...
https://techcrunch.com/2022/03/10/dot-pad-tactile-display-ma...
https://techcrunch.com/2023/03/17/the-monarch-could-be-the-n...
Something I've heard is that the content, APIs, etc are equally important, or you end up with a great device with nothing to display.