I think that the home button should be relocated to the right side of the devise, just the opposite side of the volume buttons. This way the front of the phone could be buttonless and there would be more room for bigger screen without increasing the overall size of the devise (let's face it the industry will go this way eventually, because we want devises with big screens, but small enough to fit in our pockets. Android have already done it the Ice Cream Sandwich by getting rid of the physical buttons). The button can be just as long as the length between the volume buttons and can be touch sensitive like the trackpad and when you swipe your thumb up or down you can switch between open apps and when you press it, you can have the normal home button functions. So let me know what do you think about that and how likely is to see it in the next iPhone or the one after that may be.