Cook should not do any of the introducing himself. He just doesn't have the charisma and flair that you would want a CEO to have. He should continue to delegate the presentation duties.
The law of large numbers that people have been talking about is a "problem" for Apple. If they were a private company, who cares. They continue to print money and will do so for a long long time. But this is a publicly traded company, so its value is determined by shareholders. And shareholders hopefully wise up after awhile and realize that no company stays on top forever, and no company maintains straight vertical growth (exponential) forever, and when it starts to cool off, it's natural and inevitable no matter which company is on top. They should also realize that when Apple introduces a blockbuster Apple TV and sells like $10 billion dollars worth, that it is a big big deal. But the TV market is actually not as big as you might think, meaning even if Apple captured 75% of the TV market, their profits would not go up that much. It becomes harder and harder to move the needle as a company grows. So a $10 billion increase in revenue over a year would be a huge deal to most companies, but not Apple. Therein lies the dilemma: Apple's got to invent time travel and find sustainable nuclear fusion if they were to continue to grow. Even their next bonafide hit product will make a modest improvement to their earnings sheet, and that's all investors care about, nevermind the fact that their expectations are impossible to fulfill. But that's the nature of the game--investors are free to and will definitely move onto the next big thing. Rinse repeat in 10 years. I don't like a lot of the ways Apple does things, but their earnings sheet is very healthy. It's not a chink in their armor but rather them bumping up against the laws of math.