I want an iPhone where both sides have a screen on it. When I'm on a call, the second side could have a one click button to display my Contacts so I can quickly look up contacts or a map if I'm trying to give directions. It could also display a video while I'm on the phone. I think that would appeal to the hipsters. Maybe a picture of a bullseye target would be good. =) There could also be games which played on both sides of the device making you flip the phone over quickly. Any other good ideas?