The use of sapphire in the touchID isnot really an example of runaway success. I don't really care what the glass is tbh unless it brings benefits to the end user. I like the idea of haptic feedback but I don't think that sapphire is essential to that. And Corning have produced for the iPhone and havd no difficulty fulfilling orders.
Total misrepresentation. He said the watch would be delayed to Dec 2014 when most expected it in September. He got the exact sizes of the iPhones right and was estimating delays because of the sapphire. On most of the rest he was just a few months out except the Apple TV but Apple probably are sitting in that due to content deals.