The
X45 can fly and engage targets on its own. It costs a fraction of what an F22 does and could open up a new dimension in performance. Unfortunately (or fortunately?) the US military doesn't trust a drone to do a Man's job.
The problem with drones is, they're a bitch to develop and integrate into a complete organization. It's almost funny how the first battle drones are used in the least imaginative way possible - clearing mines. Give a robot plane to Al Qaeda - they'll fly it into a Navy vessel and congratulate themselves for being tactical masterminds.
Right now, the technology is barely being utilized. What this means, is that a small group of people with proper access and sufficient resources can field a military of Superpower equivalent capacity in any region of the world - all out of a backyard in Nowhere, Alabama. They won't have the "boots on the ground", no, but imagine what a dozen fighters, unstoppable for all practical intents and purposes, can do to, say, the ME peace process. Or the situation in Taiwan. Or the Koreas.
Instead of (or rather, in addition to) paying Russia/Pakistan to prevent their nuclear stockpiles from falling into the wrong hands, the West should be watching Japanese toy makers. That's all they think drones are - toys, gimmicks. No match for a
real soldier. That's not the point. When you've got drones, you don't
need soldiers. You don't need public opinion, or foreign support, or a military-industrial complex. All you need is money and vision.
To answer your question: yes, 6th gen fighters will fly on their own. They will fly soon and whomever they fly for will shape the course of history.