We will have full blown 'battle bots' operating long before then, and without the equipment on board for human environmental needs they should be even cheaper.
We already have full blown ‘battle bots’ operating. Perhaps one of the next gen aircraft fighters will be battlefield command & control center for drones.
Sorry, but no... What we have are machines that fly by way-points and remote piloting in straight lines in benigh combat environments.
I work in unmand systems. They are incredibly expensive (No people on board to kick or power cycle a balky radio.), prone to RF jamming, clumsy, and not responsive to operator input due to communications lag.
Do you realize that the communications lag on a satellite flown vehicle is measured in minutes?
Ground station to satellite up-link, up-link to satellite, satellite to vehicle, and back?
Know what that communications lag is? Think about it. You are bouncing signals off an object that is 22,500 miles away... TWICE! One has ZERO agility with these systems.
If a manned combat aircraft shows up and he has an RF jamming pod (< 5 - 10 Watts folks!), your bird is scrap on the ground... With or without a missile up it’s tailpipe.
Physics people... You are leaving out PHYSICS! Stop paying attention to the junk you see on YouTube & comming out of Hollywood...
At best it’s all short range line-of-site theatrics in artifically perfect conditions, or total BS.