In near future (within at least a decade or two), manned weapon systems will still dominate the battlefield on this planet.
I believe eventually drones will replace manned aircraft, as well as tanks, ships too.
However, I do not believe in fully automatic drones. I simply don't trust them to make decisions lol. Full automation will eventually lead to having human interference cut out from the equation completely, and I do not like the direction it's going after that. Think about Skynet and Terminator.
I am all for remotely controlled drones with minimal automation. I understand there will be delay (like ping during gaming) when control a drone from thousands miles away, but I believe the problem will eventually be solved with technologies become more advanced.