The desktop metaphor was invented because one, you were a stand-alone device, and two, you had to manage your own storage. That's a very big thing in a desktop world. And that may go away. You may not have to manage your own storage. You may not store much before too long.

If you view computer designers as artists, they're really into more of an art form that can be mass-produced, like records, or like prints, than they are into fine arts. They want something where they can express themselves to a large number of people through their medium, and their medium is technology and manufacturing.

The Macintosh was supposed to be the computer for people that just wanted to use a computer without having to learn how to use one.

We made the buttons on the screen look so good you'll want to lick them.

First was the mouse. The second was the click wheel. And now, we're going to bring multi-touch to the market. And each of these revolutionary interfaces has made possible a revolutionary product - the Mac, the iPod and now the iPhone.

Ask for feedback from people with diverse backgrounds. Each one will tell you one useful thing. If you're at the top of the chain, sometimes people won't give you honest feedback because they're afraid. In this case, disguise yourself, or get feedback from other sources.

So when these people sell out, even though they get fabulously rich, they're gypping themselves out of one of the potentially most rewarding experiences of their unfolding lives. Without it, they may never know their values or how to keep their newfound wealth in perspective.