My view on the damage is that it was self inflicted by Sony. Sony should be taken to task for essentially setting the pattern for what happens when some 3rd world sh*tbag dictator makes a threat that they can't ever follow through with. I just don't see this as terrorism. It's no worse than someone calling in a bomb threat to gain attention or postpone an exam.
This is going to turn out to be some schoolboy level shenanigans that got out of hand, but the fallout is going to screw us all up.