See that complication of a line-drawing above? Well that's Microsoft describing how it would like to patent a function for a dual 3D and 2D camera setup that's able to process precisely where your eyes fall on a screen. While Kinect could fulfill that hardware component, the application goes into more detail on how the "gaze tracker" would calculate both the direction you're looking in and track the region of the screen that you're focusing on. It aims to do this by closely
