Don’t think I haven’t considered it. 
But with the amount of time I have these days with a full time job and a toddler at home OH 3 would be out before I finished the book for OH 1.
Besides, spending time updating the wiki and other online docs would probably be more useful over all.
You might be interested in reading some of the ideas presented on this thread.
I’ve toyed with the idea of getting a cheap tablet and building this sort of display myself, even if it does violate my HA philosophy. 