If the nuclear stand-down and inspections go forward, and tensions ease, and contacts improve, ..., then it would seem to indicate that something positive happened as a result of the youngster taking over.
If, on the other hand, the cycle of apparent concession-but-no-real-change followed by missile launches and attacks on SK and so forth start up again, then it would indicate that nothing much has changed even with the kid in charge.
Dictators often die non-violently. I don't expect him to be different.
Time will tell.
Cheers,
Scott.