According to Phil Schiller, the graphics are 40 percent faster and the computers will be using a Haswell processor, which should improve the battery life.
The 11-inch will get a 9-hour battery life and the 13-inch will have a 12-hour battery life. It’ll have up to 10 hours of iTunes movie playback, 802.11ac Wi-Fi. Pricing for the 11-inch starts at $999 and the 13-inch starts at $1,099. Apple will start shipping them today.