Here's another video of the Zelda HD demo from CES.  The graphics are, of course, running in real time. 

While you can have your map, hearts and icons designated to the controller screen (effectively freeing up the TV display for a perfect, unobstructed picture), the interesting thing is you can clearly see that the full game is capable of being displayed on both the TV and the controller simultaneously.  This raises the question as to the possibilites of WiiU's streaming ability and what it could mean for unique forms of interactivity in other games.