Some cruise missiles have the ability to choose their own target. For example the Russian P-500 & P-700Anti-Ship Missile can be fired in a swarm of 4 to 8 missiles. The missiles will skim along the surface, with one popping up to identify, designate and illuminate the target for the other missiles. It can prioritise multiple targets, and choose which one to hit. So one cruise missile is choosing targets for the other cruise missiles.
This is not new. This is 1970s-1980s technology.
So tell me again how killer robots are new?