This exact tech doesn't actually seem that new. Missiles (aka drones with rockets not propellers) have used onboard guidance (not remote control) for decades now [1].

But we all know where this is headed. It's probably not too long until someone develops a system to uses surveillance drones to monitor and area and detect targets with AI, then dispatches automated attack drones to kill anything that moves.

[1] The only remote-controlled missile I'm even aware of is this one, from the 40s: https://en.wikipedia.org/wiki/Fritz_X.