They want to use it for things like making technical drawings and so on -- personally, I don't see why you couldn't adapt something like this for forensics, or for just dicking around. I mean, you don't actually need 4 flashes to do this -- it's a parallax effect, right? So you could do something like:
(1) switch your camera to linedrawing mode
(2) aim it at the target
(3) hold down the trigger, and move it in a loose circle
and compensate for not having the flash by having a lot more images to compare. Or maybe the phone knows its position (embedded RFID maybe?) and chooses to take 4 different pictures, with flash, at the cardinal points of the ellipse you wave it in.
it's like a stupid human trick, only it's a computer doing it!