We have seen leaked images of the next generation iPhone before but those were just of the aluminum back shell.
Today, we have what looks like a completely assembled device placed next to the current iPhone 4S. As before, the device is noticeably longer pointing towards a bigger, widescreen display. We can see edge to edge glass on top and the black aluminum body on the side.
The previous pictures also denoted a two tone back, with plastic/glass on the top and bottom and aluminum in the middle. In these, however, the back seems to be of a single color. The bottom has also been redesigned with a completely new, smaller dock connector, large grilles for the speaker and microphone and a headphone jack, which has been relocated to the bottom.
As is often the case, one should take these with a pinch of salt. Still, these are some fairly convincing images. We'll be seeing more of these as the launch of the next generation iPhone draws closer.