That's almost as retarded as Nintendo INSISTING that the Wii U Tablet controller stay on, screen and all, at ALL times while the system is in use. I use the damn Pro controller to play Zelda and the tablet is always on. I can turn the screen off in the home menu but it just lights up again the instant I hit any buttons on a completely different controller.
It just sits there, draining its battery, doing NOTHING for me not even showing me a damn over world map of hyrule so I could have a clean ui free main screen and then when the battery dies I get stuck on a puzzle in a shrine because it needs the tablet's motion controls to finish. Now I can't progress further until I charge this damn thing on its dock a few hours. -_-