"Come to Jesus" moment?
While Snowden was interesting, he was mostly ignored from a security point of view - all the attention was on the information that he released and the external collection methods by NSA et. al. Home Depot and Target were simply retailer attacks and only different in scale to what has been done before and while they were inconvenient for the credit card companies, the overall effects were limited.
I feel that this hack at Sony however is different - unlike the prior attacks this has the potential to destroy the company. Discovering just how this was done will be interesting but it needs to wake us all up to the fact that it can happen to all of us.
Sure, it sounds like Sony's IT security was crap, and I guess we can say the same for Home Depot, Target and the NSA? But that's four very different entry vectors, each of which succeeded to a devastating extent - any admin who's thinking that, "This can't happen to me" needs a good beating with the cluestick,
And here's my stock tip for the new year: Invest in companies with good Penetration Testing reputations.