I wrote a paper once on this same topic a while back. I came to pretty much the same conclusion that you have.
If we read Clausewitz On War we understand that war as it was known prior to the 'information age' was an act of policy on another state to force them physically into abiding the attacking states will.
The victor of war will be the country who maximizes their use of force. You can see this take a crucial role in World War 1 and it comes into play in World War 2. This is known as 'total war' or some authors call it 'big war', so a state uses full possible force on another state in order to make them surrender to the original states will.
The last 'big war' we have seen from the powerful countries of the world was World War 2. After America dropped the A-bombs we discovered exactly how deadly and devasting 'big war' had become. As the continued testings of nuclear weapons showed great increases in power it became quite obvious that going through such a war would be pointless (
MAD).
I agree with you that instead a new type of war will be fought using information and technology. Spreading of misinformation in another state can be extremely devastating (the same way propaganda is motivating). Of course Clausewitz never having seen modern military or technology could never have predicted what we would soon become. Another form of war that is being utilized to great success is guerilla warfare. It makes it pretty much impossible for a state to impose total war against attackers, or ever really engage in traditional war. This gives the attackers a huge advantage in most cases. (Looks to Cuba

)
I do not believe that violent wars in the sense of countries destroying each other would be constructive. It would defeat the purpose of war as a tool of policy since a modern day World War would guarantee the destruction of states and not simply forcefully making them follow your will. (Not only would the military be destroyed but the governments the societies, even majorities of civilians, so what's the point?)
Since the state always strides to perserve itself it will never fight in wars that cause its self-destruction. This causes modern states to never attack full-force and is what is leading to a more technology/information run war (in my opinion of course).
I could write up a lot more but I haven't slept for 24 hours and my thoughts are all jumbled (you can probably tell reading this post) Maybe tomorrow night when I come on I'll fix up some ideas, if you have more questions then go ahead and shoot.