[lumens]

Everything about this design, from the edge to edge glass, to the Lightening + Magsafe connector is super appealing, but it's too much of a jump for Apple. Their design style is much slower and more iterative than this.

Arguably the biggest hardware leap so far was the 3gs -> 4, and that was limited to an aesthetic re-envisioning, a camera improvement, screen resolution upgrade, and processor bump.

This design showcases improvements that Apple would likely spread out over 3 generations: everything listed for their biggest leap above, plus new input mechanisms, new connector, significantly less heft, and waterproofing (!!).

Don't get me wrong -- I'd buy this in an instant, but it looks more like iPhone 8, than 6.

[Finbarr]

I think a bigger design leap is from the existing Mac Pro range to the new Mac Pro. From this: http://bit.ly/13VYioH [1] to this: http://www.apple.com/mac-pro/

[1] Apple store is currently down, this is a link to an image.