The New Apple Mac Air Book. It fits in a manila folder, you can slide it under a door, and if you threw it hard enough you could probably chop someone in half with the thing. It's the thinnest, and if we may say so, sexiest laptop around today: the MacBook Air. But looks aren't everything to everyone, and despite all the rhetoric about being a no-compromises ultraportable, Apple did leave plenty on the cutting-room floor in its quest to make an absurdly thin ultraportable that doesn't skimp on a full size keyboard or roomier 13-inch display.