Primarily? I'd highly doubt that. Small multirotors and model aircraft like these are far more ubiquitous than the machines weighing upwards of 2,000 kgs which are used by the military.

Regardless of form-factor the military is the primary player in the drones industry. The vast majority of operations and spending are classified.

I was thinking more about the future applications of high-speed small drones when they become ubiquitous. Even if it is simply reconnaissance.

Drone is way too generic of a term. Do you know of any military application of a multicopter?

I don't think multirotors are used for war, except perhaps for reconnaissance.