The personality cult is being built, as reported here and here.
The nuclear test claim is significant--and ominous. The North does not intend to scrap its nuclear arms program. A third nuclear test is probably in the works.
Pyongyang's partner in nuclear/missile crimes--Islamist Iran--will once again be present when the detonation takes place. A delegation of Iranian military and intelligence officers, scientists and engineers will observe the blast. North Korea, a country-sized concentration camp, is one place where the mullahocracy's nuclear scientists can feel safe.