"In the future, warfare may shift from a battlefield to a keyboard.
Superpowers might deem a nuclear exchange too destructive, but already they are developing Weapons of Mass Disruption; software viruses that are designed to cripple the operating systems of power stations, dams, traffic lights and public transport." see the rest HERE
You see, cyberwarefare scares me more than conventional warfare. It's one thing to drop some bombs, or put some gun toting troops on the ground... but taking out a powerstation by corrupting it's software, you don't just hurt a military. You start killing the elderly, the sick, the young... anyone that requires that electricity to stay alive. The collateral damage that comes with taking out things like power plants via cyberwarfare to me is unacceptable.