MY nostradamus prediction: Cal will coach the USA team after Coach K with Coach K's recommendation. There is some Respect between the 2.
Except K will probably hold onto that lofty perch until he's in his eighties. He doesn't seem to want to go anywhere. As a military man, he seems to have the military mindset of a regimental approach to life. I'm not sure he's mentally capable of anything other than his current pattern of life.
I don't mean that as a knock. I'll just be surprised if he calls it quits in the next five years or so. I could see this fellow going the distance.