It was the first appearance of Bill Gates and Steve together at the same conference. This was probably one of not many iconic moments of technology, as the two most prominent pioneers of technology gave their thoughts to our public ears. While both congratulated each other on technology, Bill and Steve did not agree on the hardware and software coupling future. Not to say this is surprising at all, as Macintosh was always about manufacturing their hard to their soft as a "uniproduct", while Microsoft was always made to run on as many hardware component variations as possible. Check out a nice article on Forbes for detailed quotations and more information.