There are a few such things out there, http://www.popsci.com/new-touch-screen-design-could-display-in-braille http://www.popsci.com/new-touch-screen-design-coul

There are a few such things out there, http://www.popsci.com/new-touch-screen-design-could-display-in-braille http://www.popsci.com/new-touch-screen-design-could-display-... The cost to produce them is probably very high, I imagine, especially when alternatives (like good audio/voice stuff) can do the job.