You don't need an IPhone. You want one.
It is cool and fun and worth talking about. You can easily start a conversation with someone on one of the IPhone features. It is an idea virus.
My wife is infected with the IPhone ideavirus.
"Honey, look I can fish with my IPhone."
"Honey, look I can change the TV channel from my IPhone. See ..."
"Honey, Can I borrow you VISA to buy this application? I couldn't find a crack for it."
Doesn't matter if people need your product or not. Just make sure your product can easily starts conversations and it will spread. Try to avoid the "So Whats".
If you need to call someone this should be more than enough.