abstract:Downrange is the horizontal distance traveled by a spacecraft, or the spacecraft's horizontal distance from the launch site. More often, it is used as an adverb or adjective specifying the direction of that travel being measured in a horizontal direction.
So, even on a pixel-packed Galaxy Nexus, you still can't get a "better look" at what's downrange until you shoot the image and then review the full-resolution result.
It'd be hugely valuable to have the entire bottom of the screen act as a trigger, so you can focus on what's downrange of the lens instead of how to direct your fingernail to land on the speck-of-a-button that'll trigger the shutter.