And, of course, if North Korea doesn't test another one, then it's possible that the test was a fake. That suggests that the whole thing is posturing and weakens their position. Either way, it's increasingly probable that the threat from North Korea isn't a threat to us, but to South Korea and Japan primarily.
Of course, Iran has their eyes on this too.
I should probably stop writing about politics and current events, but this sort of situation is really rather fascinating to me. 8)