5) Commercial GPS, an ever expanding market that’s becoming more popular every day.
4) Coming in at #4 is voice recognition.
3) The ability to receive and send a TV signal or FM/AM signal wirelessly from the iPhone will be our third nomination.
2) #2 on the list is a little farfetched, but it was too cool to pass up. A portable projector small enough to fit into your pocket has not yet been invented.
1) Last, but perhaps the most practical, feasible, and possible concept is a credit card.