Sony had planned to use the court action to send subpoenas to companies like Google and Twitter, in hopes of learning the identities of various other hackers. These other hackers would be added to the Sony suit along with Hotz, but now the company will have to wait for the formal hearing on March 11. That hearing could still grant Sony the ability to issue subpoenas.
Illston also granted a hearing today in regards to Hotz's Temporary Restraining Order (TRO), which had previously been granted without a hearing. According to court documents, if a hearing wasn't held by today, Hotz would be "forced to surrender his storage devices to Plaintiff SCEA, and will continue to be restrained without a hearing or consideration of the substance of the TRO order."
Illston may still rule that Hotz has to surrender his storage devices, and the results of that hearing are expected later today.