From what I understand about North Korea...and to a certain degree because of its opaqueness it's hard to understand North Korea. But if you can look at it, North Korea's chief currency, the thing that keeps the glue together in the regime, is control. They see any economic opening, any sort of China-style reforms, even Vietnam-style reforms, as a loss of control.
What North Korea seems to be doing at the moment is letting out a little bit of that control at a time, such as, for instance, the two million cell phones that are now in North Korea, or the fact that women can wear pants. But they still want that control, and it's a complete floodgates issue, I think, from the perspective of Pyongyang.