The cases indicate a slimmer iPhone, perhaps as thin as the iPod touch, which clocks in at 0.28" (7.2mm), thinner than even the bikini body of the NEC MEDIAS W-04C, which holds the "thinnest" smartphone title for now, with 0.3" (7.7mm). The cases also suggest a teardrop shape, and there have been numerous rumors of an aluminum back like on the iPad 2.
the mute button seems to have been moved around, and went to the other side of the phone.
There is still plenty of room for surprises, but if these wrappings are any indication, the next iPhone should be a rather thin and light device, with big possibility for the rumored larger display, as the cases look a tad wider and longer.
source: Alibaba via M.I.C. Gadget