He wansn't any kind of visionary. He didn't invent or design a single thing. He was a ruthless manager and marketer, abusing people and taking credit for their work.
Sometimes half the battle of making a product is to get the right people in the right room at the right time.
He managed to do that quite frequently. How much credit to give him for it is something I'm not quite sure of myself, but you really can't argue with the results.
