While the Nunchuk can be used for analog character movement, he didn't show this. The game plays fine with the Wii Remote only, as the characters automatically chase after the ball in a realistic fashion. If players need to override the automatic movement, or position the character closer to the net, they can do so with the D-pad. The game plays perfectly fine with or without Wii MotionPlus; without it, there are button modifiers to perform a lob with the A button, or a drop shot with the B button. With Wii MotionPlus equipped, lobs and drop shots can be performed by motion control (the button modifiers are also present if you have a Wii MotionPlus attached to the Wii Remote, should players prefer to use them instead). I noticed during the presentation that MotionPlus adds accurate racket rotation, and the motion control precision is better in general. One very interesting note regarding Wii MotionPlus is that the game calibrates the peripheral during load times, setting itself seamlessly before and after matches. Outside of the loading screens it also mentions that it's calibrating the peripheral, but the calibration process is transparent and happens in the background.
