The company had suggested the online gaming service would be fully restored on Saturday, but that forecast proved to be too optimistic.
The news follows Sony's decision to release the controversial movie in some theaters on Christmas Day.
Sony is partnering with Samsung to bring its PlayStation Now game streaming service to select Samsung Smart TVs in 2015.
Two US movie theater chains will screen the controversial comedy
Confidential information from Sony was leaked after a hack in late November.
Sony says VOD providers are unwilling to carry the movie.
The studio says it didn't crack under pressure from hackers, and says it's exploring alternatives to a theatrical release.
His strong words came hours after the FBI said North Korea was responsible for the attack on Sony.
The announcement follows a two-week investigation by law enforcement into the cyberattack.
The Single-Lens Display Module has vivid but unobtrusive display graphics.