Granted that there is a lot of hype around cyberwar,
let's also keep in mind the real-world demo of a weapon in this war. Stuxnet, if we believe the analysis, caused major grief in Iran and had a significant impact on the development of their nuclear capabilities.
This appears to have been well architected, tightly targeted, military-grade smart weapon that has been very difficult to remediate and caused serious hardware damage.
I wouldn't want my infrastructure to be the target of Stuxnet 2.0.