Originally Posted by Charbax
So you have both the joystick and a touch-screen with stylus for new and better navigation.
If it had a touchscreen it is highly unlikely to also have a joystick. The joystick increases the odds of a prank, because the scroll wheel was successful and did not require screen updates but the joystick presumably requires (partial) screen updates to indicate the cursor location. On the other hand a joystick is probably cheaper than the scroll wheel.