By the end of 2014 the average observer in a city with a population over 300,000 in the United States will see a drone aircraft in the sky once a month or more. By 2017, every day.
My understanding is that most drones simply aren't visible because they're small and high up and light colored, and this is why drone operators can do things like loiter over a house for several hours without the inhabitants and villagers going 'Oh my god! There's an American drone hanging around! Quick go tell our Taliban guy to abort today's mission!'
Try to predict something important in a way, that it will be easy to judge it in 2014, how (in)accurate your predictions really were. Don't leave too much space for a doubt what was really said.