Most of the experts speculate that tomorrow will see Kim Jong Un installed as his sickly father's successor. While this may happen, my belief is that the main result of this meeting will be economic. I'm betting this is the Deng Xiaoping moment, marking an historic shift to open up North Korea and its economy.
China, Japan and the USA must be concerned about future stability on the peninsula if such a young man is pushed forward as the next leader should Kim Jong Il suddenly die in the near future and I suspect this is one of the main reasons China is probably promoting a Dengist opening to the North Korean leadership.
Ironically, the CIA will also be trying to find the best "Get Well Soon" card for Barack and Hillary to send Kim Jong Il. The last thing the Obama Administration needs is an attack on Uijongbu by hard line militarists
For North Korea watchers this a very exciting week.

