In terms of portability, I don't see the value of taking a few inches off a Macbook Air.<p>The MBA already fits into all backpacks, briefcases and even those funny bags women carry around. It's very thin and light. You can't make it small enough to avoid the need for a backpack/briefcase, ie. it won't fit in your pocket, so what are you trading the screen real-estate for?<p>The only sensible answer would be 'money', ie. if it'd be less expensive, but Apple / S.J. says they don't know how to make it cheaper.