Krebs has tracked down more details on what was actually stolen you can read his full article here. From his article:
The recent hacker break-in at Sony Pictures Entertainment appears to have involved the theft of far more than unreleased motion pictures: According to multiple sources, the intruders also stole more than 25 gigabytes of sensitive data on tens of thousands of Sony employees, including Social Security numbers, medical and salary information. What’s more, it’s beginning to look like the attackers may have destroyed data on an unknown number of internal Sony systems.
The hackers stole information and then proceeded to destroy (delete) the files on the servers.
It still appears that the hackers were only after the Sony and it’s employees and not consumer information.
This information about this breech is getting worse by the day.