Practically, there is no reason why North Korean leader Kim Jong Un would ever consider agreeing to such a future as long as his nation is officially at war with South Korea and the United States and surrounded by American forces. Including, of course, nuclear weapons.
The last national leader to willingly give up his nukes was Libya’s Muammar Al-Gaddafi. And, as Kim well knows, it did not end well for him.
So the historic meeting of Kim and South Korean President Moon Jae-in is notable for the fact that the two leaders have officially set themselves a course of “denuclearizing” the Korean Peninsula.