That’s not a single technological advancement though, it’s multiple.
But either way, I think it’ll make a difference because it eliminates a big factor that’s always been present:
Humans.
Autonomous robots would never tire, would be able to maintain themselves to a degree, and the controlling force never has to worry about their loyalty. Also eases stress on the empire’s citizens because they’re not the ones being sent to fight anymore, either. Easier to do the bread and circuses.