Steve really had product presentations down. I wish people at least tried to copy him.
Fart noise
Look at the MacBook Air launch. Jobs didn't have to say anything about how thin it was, or list product dimensions on a spec sheet. He just pulled it out of an envelope.
Likewise with the iPod. "1,000 songs in your pocket" not "It has a real hard drive with 5GB of storage."
"What is the MacBook Air? In a sentence, it's the world's thinnest notebook". [1] Then goes about listing product weight and dimensions of competitors. Granted he then visually compared the thinness, but still listed numbers.
THEN he mentioned the envelope and pulled it out... Then more specs (in the Apple style like it looks good, has a multi-touch trackpad, etc, followed by actual HDD/SDD size, and CPU spec available).
Masterfully done and well-presented regardless!
AND the product was right then and there and he could demo it and use it live
Steve practice his speech and keynote way more than any others. Once you have talent + hardwork it is hard to replicate. But even taking out the talent itself, none of the keynote are prepped to the details of what Steve would do.
In Steve's view. They probably don't give a damn about product marketing.