If data retention becomes a liability, will companies be forced to consider encrypting data or taking measures to ensure they don't ever see it, and thereby upend their business models? Or will governments require them to have a backdoor to the data?
The initial impact is companies from other countries will refuse to work with any company outside of their perceived comfort zone.
Take a company from Qatar. Perhaps they are comfortable with any datacenter in the middle east for Cloud Computing with a US company. If this becomes standard US law, they won't accept a US company for any reason. Thus every US company loses the customer, the profit, the business and it's replaced by others.
It's that simple. And what about companies that are from another country, but have US entities?
It's just a massive issue that could destroy corporate cloud computing.