A method of controlling contents displayed on a display includes processing inputs from different users across multiple application windows of one or more applications displayed on a single display of a user interface, resulting in a multi-user graphical user interface (GUI), the computing environment running an operating system (OS), the computing environment having a multiple input detection system to respond to user inputs from different users simultaneously, the multiple input detection system including a touch screen on the single display that detects touch inputs and a contactless gesture sensor that detects contactless gestures. When a user input is detected by the touch detector, the GUI displays a first input interface to be used with touch. When a user input is detected by the contactless gesture sensor, the GUI displays a second input interface to be used with gestures, the second input interface being different from the first input interface.