1. An apparatus for use with at least one display device and at least one image capturing device, the apparatus comprising: a processor; one or more memories coupled to the processor, the one or more memories having stored instructions that configure the apparatus to implement: display logic configurable to output at least one signal suitable for causing a display device to display at least two different selectable regions; and pose estimation logic operatively coupled to the display logic and the interface logic and configured to determine a first head pose based on a first image and at least a second head pose based on a second image temporally subsequent to the first image, and automatically switch an operative user input focus between the at least two selectable regions based on at least one difference between the first head pose and at least the second head pose; the pose estimation logic being configured to: image patch track at least one facial region associated with a portion of a face in the first image to a corresponding portion of the second image, detect at least one face area comprising at least one key facial component based on the image patch tracking, and produce at least one of a coarse pose estimation based at least in part on the at least one detected face area and a fine pose estimation based at least in part on the at least one key facial component.