By far the worst damage is all that lost capital is going to flow into helping to generate a vast supply of new and bigger competition overseas. So not only will the US companies lose sales in the immediate future, they'll face amplified competition that will hit sales even more so long term. Even if the US Government has cleaned up this mess by the end of the decade, it won't matter, the financial consequences will just keep rolling.
When it's all tallied up, I think the NSA and US Government abuses will cost the economy trillions of dollars in value over the course of a few decades. Something akin financially to a hundred September 11th attacks in damages. Oh the staggering brilliance of the DC machine.