This is all part of a greater action to help families separated by the boarders to be able to talk to each other again. Since the Korean War many families were seperated and have not been able to talk to them since the truce in 1953. With these failed talks it is on,y bound to worsen relations, which seemed to be on the ropes before this. They apparently nearly went to war earlier this year when North Korea was accused of planting mines on the boarder that maimed two of its guards.
Personally I don't know if they will ever come back to sign a treaty with each other as the countries it seems are now so different and separate. I hope at some point they can put there differences asaide, but at the moment it seems like an impossible task.