The 11-inch MacBook Air is marvelously twee—most people will quite literally marvel at it. It's stupid thin. And if it were any lighter, it would feel more like a trick than a tiny wonder of engineering and design.
The new 13-inch MacBook Air is Apple's katana blade: thin, durable, powerful, sleek. But does it have enough mettle to be your weapon of choice? Abandoning the metaphor: can you ditch your MacBook Pro?
Externally, the new MacBook Air hasn't changed at all since launch. Internally, however, it's significantly more powerful. This latest update shows the difference between being thin by starvation and being thin through exercise.