MacNut
macrumors Core
Still not worth an upgrade IMO. I would most likely case it anyways as it would be far too small to hold making those features a moot point.It has a better rear camera, and a higher resolution front-facing camera. It also has a faster processor. It's thinner and lighter, and it doesn't have glass on both the front and the back. The display is thinner, so there's less glass between you and the display, or between your finger and the touch screen.
Also, the iPhone 5 has the new dock connector, which is smaller, and you can plug it in either way.