It's also a cry of "look at me Obama, Aso, Myung-Bak!" as the realization sets in that The "Democratic People's" Republic of Korea is a waning power with a large, agricultural picker Army that now has to compete with two Wars and a really bad economy for US/Asian gov'ts attention amidst NK's catastrophic famine and poverty-level funding...
I think they now realize the inevitable unification of Korea will not involve them much, and every year their vintage military degrades more and more from the last significant updates that took place in the 1980s...
Their nukes really don't work and the missiles are archaic and unreliable at best...and they can't even hope to win by blitzing the south anymore...