I don't see signs of drones getting smaller. It seems to me they will only get bigger and heavier especially if companies like Amazon are going to be using them to deliver products.
Tiny drones are much more common now as well - I've got a drawer full of Cheerson CX10s which weigh all of 30g or so (about an ounce). I strongly suspect the bulk of the "700,000 drones sold" are made up of devices closer to my CX10s than they are to "washing machine sized" ones capable of getting to 10,000 feet.