Earlier quoted context omitted.
Oracle has been run by the three of them for awhile now. This is most likely a reduction in the responsibilities for Larry (ie. not getting flak for skipping out on earnings calls/keynotes when he wants to watch his boat race) and thus mostly a change in title without significant change to operations (other than messaging to the Street what the succession plan is).
Yeah, I think Ellison is heading for a "phased" retirement. Eventually, he'll give up the CTO role and just be Chairman. Then he'll give up the Chairman role (perhaps when he dies).
Also your mention of his eventual death sounds insulting. There are plenty of better things to pick apart Ellison for besides his age, and he isn't all that old. There isn't a single mention of his health in the wikipedia article about him: http://en.wikipedia.org/wiki/Larry_Ellison