I think that they will be happy with whatever happens as long as they get to remain in that class.
This all comes down to China backed Kim into a corner, their nuclear program reached its research peak, and because they have “legitimized” themselves as a nuclear world power, they now can sit at the big boys table in negotiating peace talks.
South Korea has wanted re-unification for decades. There are still families split from the war, and many families split from North-South right now. Any easing of tensions is good news here.
Kim just wants to maintain his rulership over his people, but also not lose everything to tough sanctions from China. He knows how rich and well off South Korea is. North Korea could be like them too, if they wanted.
Look at Saudi Arabia!!! A rich prince who gets to have WWE events held in his home country, hobnob with world leaders, and live a lavish rich lifestyle. This is the dictator’s dream. A semi-legitimate dictatorship that is just sane enough for the rest of the world to over-look their human rights abuses and work with them.
This is what Kim wants, he wants to be leader, but still able to buy Ferarris and fly plane-loads of falcons around
Of course, NK doesn’t have oil though… [but they do have some amazing mining natural resources which could make someone in charge VERY VERY RICH
In any discussion of NK’s future, it comes down to. What benefits Kim Jong Un most? I see a world power similar to Russia (in terms of relations to the US) with the ability to supply South Korea with minerals to produce cars, tablets etc, and join them as a rich nation, with Kim Jong Un at the helm, holding onto power through Chinese/Russian tactics (hacking/state media/secret police)
Is this great for the average North Korean? Not really, but it sure as hell is better than what they have.
I sincerely hope this goes well for Korea, as re-unification (including dismantling of the forced labor camps, weaking of Juche.
What this means for the ruling class? More access to world travel, foods, tech, etc. They already have the college education, good jobs and houses, they just can do more with what they have. This is a win for them (and really everyone).