Good point, but in a war, the goal is to disarm your enemies in order to pacify them. I'm not sure how you disarm a hacker in this century. State sponsored or not, everyone will have access to a computer.

Look up the lazarus group, state hackers from North Korea. The way you seem to be thinking about war doesn't apply at all to the current situation.

If this century sees large-scale DDoS attacks, information breaches, power plant / pipeline shutdowns, etc., I strongly prefer that to the trench warfare and carpet/nuclear bombings of the last century.

Hacking wars are lukewarm. A hot war seems like it will involve a lot more drone strikes -- which might not be significantly better than the last century, but terrifying nonetheless. And until it comes home, I don't think Americans will fully appreciate how our government (hence, our nation) is perceived a terrorist organization abroad.