As Hereditary Prince and as King, Olav lived and reigned in a difficult period; he lived the German occupation and the exile and after, he lived the "cold war" and the great changes of the second part of the XX century; he has been able to create a newly, an innovative, image of King's role and Monarchy role for Norway, if he didn't make this work I'm not sure that Norway would be a monarchy today!
I guess, but it's just my opinion, he should be an example, a lesson, for his grandson Prince Haakon Magnus...but just history will be able to tell it!