Jobs' use of the word "magical" hit the nail on the head. Jobs' keynotes are more than just speeches. They're magic shows.

A skilled magician makes you believe in magic. He makes you believe the magician has supernatural powers to, say, make people (or competitors) disappear. But there's no such thing as magic. The magician makes you believe by showing you one thing, but keeping you in the dark about all the facts that might shatter the illusion.

Now, all this sounds negative so far, but I am in fact truly in awe of what I witnessed Tuesday. Steve Jobs is the Salesman of the Century -- nothing wrong with that. And Apple and Jobs have done everything right with the iPhone -- so far. I certainly want one, and am rooting for Apple to dominate and transform the handset industry.

However, I fear that the iPhone vision and the keynote were so flawlessly executed that Apple may have raised expectations that will be hard to fulfill. The things that might shatter this wonderful iPhone illusion are the things we do not know.

Here's are 20 unanswered questions about the Apple iPhone: