The iPhone 5 apparently won't be announced until September or October, but evidence continues to mount that suggests it will have a 4-inch display. Now a video has been posted on a Japanese website showing a front panel for the new iPhone and comparing it with that of a current iPhone. It gives you a clear picture of how much taller the new phone will be. Of course, we don't know if this is a legitimate front panel, and even if it is, we don't know whether Apple will come out with this form factor or some other one that they might be working on. But every bit of new evidence that emerges increasingly suggests that we'll see an iPhone with a 4-inch display.