Here is a giant one 42’ 
https://www.quirklogic.com/collections/products/products/quilla
I wonder if the stylus can advance pages. It would be great to be able to read novels from the other side of the room. It would be like a less flexible but far more expensive option to a conventional e-reader.
Looks like something for the corporate world. Would be nice for schools but expensive. Cheaper to get paper.