I suspect there will be a fairly long lasting middle step: an AI piloted "mini jet fighter". Say 4x smaller, but faster and more maneuverable by virtue of not having to protect a human pilot, and still capable of carrying existing air to air and surface to air missiles. It will sort of be an auto-piloted aircraft carrier for the missiles, which at some level are the "real aircraft" these days already. The missiles need a larger, fast and hard to shoot down vehicle to carry them into the region of combat.