Apple MacBook Air 3 lbs. Price: $1,799 and up You can buy a lighter machine from Sony and Toshiba. But it's hard to find anything that matches the MacBook Air's style. Its thin, tapered edges are sharp enough to cut cake. Moreover, its 13.3-inch widescreen display and full-size keyboard means you won't notice you're using an ultra-light laptop until you fold it up. How did Apple do it? Simple, they ditched the machine's optical drive, betting users--most of whom already own a laptop computer--will never miss it.