Bruce Schneier gives a good definition on what is cyberwar -in his opinion- and information war. As he right states, they are not the same. This is not the focus of what he has written, so hang in there until you get to the end. It is worth reading. I am not completely in agreement with how seriously he views these threats, I see them as much higher because of combined impact of cyberwar AND information war.
Then think about information war today. YouTube is being used for example -as an extension to existing media- to influence public opinion.