NK has developed a nuke capability. The labs involved in development can now be shut down. I believe they will continue to develop production facilities at a different location.
NK has demonstrated an ability to reach Pacific Ocean targets including the state of Hawaii. The capability to reach the mainland has not yet been demonstrated. Kim "suspended" further missle tests. NK has launched the ICBM, Hwasong-15, which is a new nuclear missile capable of hitting anywhere on the planet with minor easily accomplished modifications. In fact, the launched Hwasong 15 missle could easily have been a "detuned" version.
NK has successfully launched submarine based missles.
Kim has no intent to give up his nuclear program. He believes he is now on a level playing field because even one detonation in a populous region anywhere is unacceptable. Retaliation would occur, but the damage done by a single warhead NK first strike has to be rekoned with in any negotiations. Then Kim has said he wants to bring up the Israel/Arab question even when interviewed about any de-nuclearization talks with the US. He is greatly beholden to Pakistan for nuclear technology. He's getting more cocky, not less.
This could all turn out not like we hope for.