Which Applications Are The Easiest Sell? IOW Where's The Growth?

It seems like a lot of this UAV technology is “nifty” looking and there’s some obvious benefits but which industries and which specific applications in those industries are finding it to provide the highest benefit to cost ratio?

The obvious is offering a new perspective with just plain old aerial photography.
But if your usage of DroneDeploy is considered and you shoot your project using their tools and apps, the plain old photos come along as a bonus! Just started playing with the offerings of DD but from what I have seen, I am very excited about the offerings and capabilities and possibilities.

Your post title is the million dollar question, though. Figure that out and you (and all of us) are golden!