Except they already make bigger than that. A 25x40 display. https://www.wikiwand.com/en/Refreshable_braille_display https://www.wikiwand.com/en/Refreshable_bra

Except they already make bigger than that. A 25x40 display. https://www.wikiwand.com/en/Refreshable_braille_display https://www.wikiwand.com/en/Refreshable_braille_display A full page braille display with 1,000 cells (25 lines of 40 cells) was developed in 2015 by the Tactisplay Corp.[3] With total 12,000 pixels configured in 120*100, it can show any BANA compatible braille graphic page in 8 seconds. This video shows operation of the device. http://www.tactisplay.com/product/tactisplay-table http://www.tactisplay.com/product/tactisplay-table