The company conducted an independent report into sound levels and King said "it was very clear early on" that the "orientation and position of the stage" was of crucial importance.
The capacitive display can recognize orientation, letting you drop the controller in any position throughout the surface, then outputting a map to match.
The Wii U controller contains the same motion tracking hardware as a Nintendo Wiimote, which means the system can track its relative position at all times, and update the controller screen depending on its orientation.