Disclosed herein are technologies that give a disproportionate amount of screen real estate (or container real estate) to one of a group of user interface (UI) subcontainers to which a user is giving his or her attention. More particularly, in response to an indication that the user is focused and/or interested on a particular subcontainer, the device enlarges that subcontainer to occupy more (and perhaps all) of the available screen (or container) real estate. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.