This. Exactly this is why it's significant.

Even a small piston powered Robin helo is around $500 to operate per hour[1], and the smallest turbine powered ones are going to be around that figure just for the fuel: ~500 lb/h fuel consumption [2][3], JetA at > $6 / gallon [4].

So for one hour helo ops, you can purchase 2-3 parrot drones [5].

[1] http://www.aneclecticmind.com/2013/09/12/why-i-charge-545hou...

[2] http://www.turbokart.com/about_arrius.htm

[3] http://en.wikipedia.org/wiki/Eurocopter_Colibri

[4] http://www2.jetaviation.com/index.php/jet/bedford/fuel

[5] http://www.amazon.com/Parrot-AR-Drone-Quadricopter-Controlle...