Here's my prediction, lots of hype as there was in Europe and then the discovery that they don't work in high winds at a drop of a hat and can be dangerous to all involved. Then the quiet withdrawal of projects. I have also said that until America has regulations none of this tech will be considered invented. Even though Australia and Europe are pushing on.
I have a collection of Police related UA stories here
http://www.suasnews.com/category/police/
Nobody can be producing UA for the Police yet as the ASTM F-38 process is on going, oh yeah that's the airworthy standards group headed by Ted from Aerovironment, guess the Qube will be upto spec ;-)
The Police will end up operating Predator class platforms, well actually share large platforms with multi agencies buying time as required on persistent platforms that are there anyway. Just my thoughts!