Many joked at the lengths Sony may go to secure it's data but back in May Sony filled in a patent to store biometric data online to keep an eye on customers in the future. The patent lists a problem of how the main problem is usually the main accounr holder rather than someone who has been given the device after it has been unlocked, this will be solved by use of DNA. "To overcome the above disadvantages, embodiments of the invention are directed to consumer devices and methods for operating consumer devices. According to embodiments of the invention a user of a consumer electronics device is uniquely identified using a metric that is contingent upon the user using the device normally. Content that depends on the user’s identity can be provided to or from the device. According to certain embodiments, a user may be uniquely identified using a biometric sensor to provide the metric. Examples of suitable biometric sensors include fingerprint sensors, hand sensors, face recognition systems, iris scanners retinal scanners, voice pattern analyzers, and DNA analyzers. The biometric sensor senses a user biometric during normal operation of the device by the user. In certain embodiments of the invention a user identification unit incorporated into a control module of the device." The patent also goes onto list how Sony could use the data to make a profile on you to suit your gaming preferences and how they could end piracy for good. The patent can be found here
SourceThere could be benefits that could come from this, but I don't think so