Apple has revamped its razor-thin MacBook Air notebooks to include backlit keyboards and new Intel processors paired with solid-state storage for nimbler performance and long battery life. Better performance with fewer trade-offs means there's a lot to like about the 13-in. (33 cm) version, which starts at $1,299 and features a high-resolution 1440-by-900 screen, a thickness of just 0.68 in. (1.7 cm) and a weight just shy of 3 lb. (1.4 kg).