And it's about time. Castro is quoted as saying that he wanted to take time to prepare the Cuban people for the shock of his resignation.
Maybe Castro himself is the one who needed the preparation to leave office. That seems more likely. With rumors of his death and the counting of days since last seeing him in public, I don't think anyone would be so shocked at his leaving the political scene except Castro.
Poor guy. No more parades or waving throngs of admirers. He must be missing it.