Preview at WWDC likely in June, followed by September launch.
Apple Announces New MacBook Airs with Haswell Processors and 'All-Day' Battery Life
With the new Haswell processors, The 11" MacBook Air will now have nine hours of battery life while the 13" MacBook Air will have a stunning 12 hours of battery life.
In addition to Haswell processors, the new MacBooks feature 802.11ac compatibility, with support for the "Gigabit WiFi" 802.11ac specification. Gigabit WiFi offers speeds up to three times as fast as existing 802.11n wireless networks.
The 11" MacBook Air starts at $999 with a 128GB hard drive and the 13" MacBook Air with a 128GB hard drive starts at $1099. Apple's MacBook Airs are available today from Apple's Online Store and at retail locations.