This one's simple. Folks at iResQ managed to get some leaked parts of the new iPhone and assembled them together and here's a gallery of their results.
To be honest it doesn't look any different to some of the photos that have been leaked earlier. The only noticeable things are the unibody design and the 4-inch display. This is a tough bet for Apple because after Apple's recent win against Samsung and the growing number of SIII sales, Samsung is gaining traction among the consumers and truly becoming an alternative to all Apple products.
The new iPhone definitely has to offer something different.