Apple promises all-day battery, while WiFi is also upgraded to 802.11ac which gives it up to three times the performance.
It will be available in 11-inch and 13-inch guises, offering up longer battery life of 9 hours and 12 hours respectively.
Yeah, yeah, let's talk bucks
The 11-inch model will start at $999 (around £640, AU$1055) for the 128GB version and $1199 (around £1260, AU$) if you fancy 256GB - which is cheaper than previous MacBook Airs.
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Meanwhile the 128GB 13-inch MacBook Air starts at $1099 (around £710, AU$1160) and the 256GB version begins at $1299 (around £835, AU$1370).
Both models will start shipping today in the US at least - there's currently no word on international availability and pricing.