I think one reason store chains etc are moving to touch screns is that they can push various changes centrally. I recall seeing older systems that used transpa

I think one reason store chains etc are moving to touch screns is that they can push various changes centrally. I recall seeing older systems that used transparent keycaps, and invariably they would be covered in stickers and whiteout as the employees had tried their best to implement changes on the fly. And now that i think about it, were there not a story posted a while back about a restaurant where the waiters used an age old grease marker on the screen of their POS to mark reservations that had arrived? This because while the software had such a feature, it required too many clicks or some such to be effectively done during a busy day.