You can't just ask customers what they want and then try to give that to them. By the time you get it built, they'll want something new.
Bottom line is, I didn't return to Apple to make a fortune. I've been very lucky in my life and already have one. When I was 25, my net worth was $100 million or so. I decided then that I wasn't going to let it ruin my life. There's no way you could ever spend it all, and I don't view wealth as something that validates my intelligence.
I think money is a wonderful thing because it enables you to do things. It enables you to invest in ideas that don't have a short-term payback.
And it comes from saying no to 1,000 things to make sure we don't get on the wrong track or try to do too much. We're always thinking about new markets we could enter, but it's only by saying no that you can concentrate on the things that are really important.