Having tried to use them in theater, it's a hack. A useful hack that fills a niche for a few players but it's not a long-term solution for many reasons.
That said, Foreflight + BadElf dongle is the tits for CONUS flying (for us poor bastards without our own moving map)
Yeah, and JDAM is a used to fill a niche for a few players as well. I don't care if all of NAVAIR uses them, but they are useful in several communities.