A computing device includes an immersive environment module for facilitating simultaneous display of a plurality of applications on a display device without relying on system chrome. At least a first of the applications is displayed in a primary region of the display. The computing device also includes a UI management component for enabling a user selection of an application for simultaneous display on the display device with at least one other application. Processing logic is configured to determine a size in at least one direction of content of a user-selected application as it is displayed on a non-primary region of the display device simultaneous with display of content of the first application on the primary region of the display device. The determination is based at least in part on one or more pre-defined size requirements specified by the selected application.