As WWDC '11 gets closer I'm beginning to wonder what the iPhone 5 will have that users "won't be able to live without". Looking at the history of iPhone, each yearly update has brought to the table something that changes the game. With the iPhone 3G users got data speeds that were twice as fast, with the 3GS the iPhone was twice as powerful, and with the iPhone 4 there was the retina display. I think I'm not alone when I say that with each iteration of the iPhone so far there has been one feature that makes the previous model feel completely out of date. My concern is that the iPhone 4 is so advanced that Apple will be unable to think of a feature for the iPhone 5 that will change the game again. At first I thought it would be 4G capability, but the more news I hear about it from the carriers, the more I feel like 4G will be more of a 2012 thing. So, what do you think the one killer feature of the iPhone 5 will be?