Snowden's leak suddenly left people wondering if the United States itself posed the greatest threat to the US's own "cyber security." There is little doubt that the revelations did severe and lasting damage to US companies who want foreign customers.
Today the problems are, someone might have been able to access your Yahoo mail in the past two years. As computing and bandwidth expands and blends in to the background, future exploits will be things like, every moment, visual and audio, of the past two years of your life, was recorded and is available to playback in full detail. For better or worse, of course the government will get heavily involved.
It was base-level obvious that the US, EU and every other nation had cyber-warfare programs because there was no technical reason they couldn't, and the risks were the same as they were to China and others: its an invisible, zero-casualty engagement, indistinguishable from the actions of lone individuals or groups.
Moreover, it should always have been apparent that things inside the US could be arbitrarily subjected to search and seizure. This is not a problem companies are unfamiliar with - mining companies are big on sovereign risk, but moreover, it's not like Microsoft stores it's technical data on Google cloud services for exactly the same reasons.
The most surprising thing which has been disclosed nowhere by the Snowden leaks is any evidence of the NSA passing stolen technical schematics or plans off to US companies for competitive advantage. I'm sure a lot of people will insist this totally happened, but no one has come up with hard evidence that it has.
(Coverity Scan contract expired in 2009, but Coverify found out finding bugs in open source software is a great marketing campaign anyway, and continued the service.)