Something like this, mounted to the side of my x-keys would be awesome with a touch interface for the "lesser used" things... like a button to form group, a toggle to put up my raid target icons if I'm raiding, the fact it could be dynamic in it's display and function without having to memorize 20 keys in 4 roles each... I'd stick to my keyboard/mouse/x-keys for combat stuff, but for the 1 off stuff like eat, drink, buff, etc it would be great.
http://cdn.shopify.com/s/files/1/002...png?1261089381