What's claimed to be a case mold for the forthcoming iPad mini redesign appears to confirm expectation of thinner bezels, and Touch ID in the power button.
According to Techordo, the case mold shows that the traditional Home button has been removed. This allows for a narrower bezel on the bottom edge of the device, and the rest of the display has similarly slimmer edges.
Case molds are produced by manufacturers who are producing accessories, such as cases. It's not common for Apple's case molds to leak, but it has happened before.