The leaks are coming at us on a regular basis now, and this is the best leak we have had so far. The above video is courtesy of macitynet.it, and it shows the iPhone 6 compared to the 5S.
Some time ago specs and schematics for the iPhone 6 were leaked and a lot of sites started posting mockups based on those leaks. We've seen cases leaked by manufacturers who get their hands on the specs so they can produce cases in time for launch day. All of these leaks are starting to come together and provide a consistent picture of what the next iPhone will look like.
The video above shows several shots of the iPhone 5S next to the iPhone 6. The shots seem to line up perfectly with every other leak we've seen so it is looking more and more like we won't be surprised when the iPhone 6 is announced. It will sport a larger display, a relocated power button, and much thinner design.