Honestly I've been wondering for years why this is not already happening routinely. Not that I hope it, but I would say that even right now move a small bomb on a drone and letting it explode close to a random target should be quite easy for lightly organized movements, let alone modern armies. Why is so hard for the US to launch a horde of exploding drones towards Putin at the next time he sets foot outside of a building? Or for Russia to do the same for Biden?
Again, I don't hope that's our future, I just cannot understand why it's not our present already.