It's been years since I saw that presentation but I remember what he said. Why? Because the slide showed a deck of cards. Pictures trump words.

Jobs expects excellence from himself and others. His presentation style is now part of the culture. Apple's VP of marketing, Phil Schiller, performed admirably at Macworld 2009 when Jobs was absent for health reasons. He did everything that Jobs would have done. The presentation included visually striking slides, demonstrations and a commitment to the rule of three.

We learn best by absorbing information in chunks, and chunks of three seem to work best. Comedians know that three is funnier than two, playwrights know that three is more dramatic than one, and Jobs knows that three is more persuasive than five.