Eh - nothing will come from this anymore than any other incident. This is the same song and dance that has been going on for years. They just feel a little braver today because they know America isn’t going to stop them. A STRONG letter of disapproval will be written. Perhaps a letter from the U.N. - a phone call from China and Russia. Then North Korea will be given more money and incentives to back off a bit. Wash - repeat.
Update:
Some 60~70 houses are on fire. Houses are packed one next to another, making it easy for fire to spread. Full damage assessment is not possible at this point. Due to heavy smoke and sporadic NK shelling still in progress.