Oddly they're never caught on in the superfuturistic world of Tidy Haired Thought Leadership™. We've focused on direct brain shunt downloads of kilo-slide Powerpoint decks.
I used one once but it crashed before I'd drawn nearly enough kittens to explain something complicated enough to warranty a kitten-based explanation. And they wouldn't give me a flipchart for 'environmental reasons.' So I drew on the wall.
Anyway, if you're in a boardroom and some idiot has drawn kittens all over the side wall, that's me. Indelible, who knew, I thought that meant you couldn't eat it.
Not helpful, but seriously what were you expecting when you started reading this.