Apple improved its already-popular MacBook Air this year with a few nice upgrades. First, the ultra-thin laptop now features a more powerful Intel Core i5 processor, replacing the Intel Core 2 Duo chip of older models. The new MacBook Air can also support up to 4 GB of memory and comes with an Intel HD Graphics 3000 processor for better visual performance, as well as a new Thunderbolt port. While the MacBook Air lacks some amenities like a USB 3.0 port but Apple's sleek notebook is still the gold standard for the new ultra-thin movement. The MacBook Air starts at $999.