I had already made a comment on this in another forum, but I am greatly dismayed by Sony's actions on this (even taking into account that they may have been acting out the wishes of the theatre chains). It's important to keep in mind that the so-called "threats" on theatre chains were, according to reports from Homeland Security and the FBI, were not credible (I highly doubt that North Korean agents would be able to carry out such threats). Furthermore, Sony was far more concerned about how the nameless hackers/criminals (ostensibly working under North Korea) were threatening to release terabytes of data that they had hacked and stolen from them if the movie was released into theatres, essentially giving into blackmail. But what is stopping these hackers from releasing the data anyways, or selling the data to the highest bidder to anyone, be they cyber-criminal, rival company, etc.?
Frankly, I'm worried that Sony's actions may set a precedent where other hackers may target large companies or other organizations (if they haven't already). I should also note that this whole incident should serve as a giant wake-up call for companies, governments, NGOs and other organizations on the importance of cyber-security, and investing in cyber-security. From what I've heard in the news, Sony's cyber-security measures were an absolute joke -- sensitive data were not encrypted, basic password management were non-existent, etc.
[As an aside, I was not even particularly all that excited about seeing this movie to begin with. I wouldn't be surprised that all the press attached to this movie will mean that, (a) pirated versions will become available online, and (b) once the film is released, expect to have record sales on opening week, or DVD sales to hit the roof because of the notoriety.]