I just don't think we understand people that well yet, let alone that we are able to copy them so effectively. Is the analogy of astronomy to Newton a good one? No. Business isn't anywhere close to being a science like Astronomy. Other people can observe and repeatedly make tests that further our understanding of space. Can you do that to a person, especially after they are gone? Nope.

Sure, Apple will exist for a long while to come, it will probably follow a lot of the principles/ethos of Steve Jobs, but will it be as successful without Steve Jobs actually making those decisions? We'll see.