The interesting thing is that defense is going to take a huge leap forward.

Attack drones are complicated pieces of equipment that need many systems to work. They need fuel to fly all the way to the target. They need munitions to effect high damage with low weight. They need lots of radio gear...

A defense drone can be as simple as a brick tied to a balloon. All it has to do is get in the way. It is cheap and disposable.

That stupid looking mobile gun in the picture above is a sitting duck for a bunch of grenades strapped to RC cars.

The attacker loses a lot of resources, the defender loses little.

But, these are just examples that are easy to conceive now. We will actually see technologies that will stop explosions from happening in set areas.

Further, there is going to become a ... way of being, similar to "better dead then red", but for reals. Where the "victor" in an assault to gain resources will gain nothing but burned out husks. Further, with the internet, they will get the entire world upset at them.