In their concept design NAK Studio suggests a fairly major departure, moving the home button from the place it has long held at the bottom bezel to the side of the device. Doing so allows them to push the screen up into the size range of the Galaxy SIII without making the phone nearly as large. Of course removing the bezel could lead to accidental touches of the screen as you hold it, so they address this somewhat by rounding the edges of the phone – almost akin to the iPhone 3G/3GS, albeit cut off by a flat iPhone 4/4S back.
The result is something that’s very new and different, yet still feels distinctly “Appley”. It’s probably too radical of a design change to actually come to fruition, but it’s sure lovely to behold.
Concept design for the "iPhone 6"
source: NAK Studio via Pocket-Lint