if there is an upcoming Flir iphone case, I don't think it's beyond the capabilities for a drone to have something similar.
(flir one : http://www.flir.com/flirone/ )
(flir one : http://www.flir.com/flirone/ )
That's a really nice price on the one you linked to
http://therm-app.com/ (an android verison, too expensive, didn't search for any alternatives)