Apple calls the MacBook Air ($999-$1299) the future of the notebook, and the line’s just been updated across the board. The key feature: all-day battery life. These Macs use Intel’s new Haswell processor system, meaning they can get really impressive new battery life of up to nine hours for the 11” model, and 12 hours on the 13” version. They’re also packing 802.11ac for faster Wi-Fi. You can pick up a new MacBook Air…
