I envision the future of the A-10 as being the leader of a drone “wing” team. That is, the drones, either generic or specialized, tag along, and the A-10 pilot can designate a particular drone to attack an assigned target.
Once directed at a target, it would use a combination of its own targeting, the A-10 pilot modifying its directions, and remote drone pilots as they operate right now.
And while this is going on, the A-10 pilot can also do his own mischief.
The Air Force is already working on this; swarms of drones controlled by manned aircraft in the area, or remotely, much like Reapers and Global Hawks.
On a related note, the USAF is also developing the “arsenal plane” concept. Behind the battle lines, a specially equipped C-17 or B-52 will launch scores of stand-off weapons, which will be guided to target by F-22s, F-35s, or modified legacy fighters.
And air-to-air lasers are on the horizon, too.