Agreed, there's no way to project forward his success. His track record however is such that if I were to pick between Steve Jobs and Tim Cook to lead Apple, I'd pick Jobs.
Sorry for my disappearance folks....I've been busy running a little company of my own and selling things that actually work...unlike Apple and Tim Cook.
I agree with maflynn, I'd pick Jobs in a heartbeat over Cook. Steve was a shrewd businessman with balls, Tim is nothing of the sort.