This is the short-term transition away from having any pilots at all. A drone can make high-g maneuvers far beyond anything a pilot can handle. Within a decade the concept of 'fighter pilot' will be an historical footnote, at least in NATO. Fighter pilots in other countries will be better described as 'drone targets', as will just about any military pilot outside of a rescue helicopter.
The drones in the air are only one part of the change. The potential for upheaval on the ocean is even more dramatic. A major part of current US dominance are the massively powerful carrier groups (any one of which outguns the next 12 most powerful militaries in the world, most of whom are allies). But there are prototypes out there for cheap autonomous underwater drones. How many $5000 plastic underwater drones full of explosives would it take to destroy a carrier? How large of a swarm of cheap underwater drones would it take to find and sink a multibillion dollar nuclear sub? After the first one sinks, the rest will be completely obsolete and might as well paint giant targets onto themselves.
Perhaps more alarmingly, it will be possible to build such things without much accountability - somebody could take out the US Navy without anybody genuinely knowing who to blame - though of course we can assume some weak oil country would be bombed into oblivion in short order.
Once the very attractive and appealing low-cost low-risk drone genies are out of the bottle, almost all current military hardware will be obsolete. Possibly not a bad thing, but it really depends on what and who replaces it.