Kicking off its 2023 WWDC keynote today, Apple announced the all-new 15-inch MacBook Air. It features a 15.3-inch Liquid Retina display, an M2 processor, and up to 18 hours of battery life. It's largely the same package you get with the 13-inch Air, with a larger screen, but Apple claims it's the world's thinnest 15-inch laptop. It starts at $1,299, and is available to order today.