There will be three sizes: 12”, 14”, and 16”.
12” Macbook will be the entry level machine with lower capacity SSD and RAM and previous generation ARM CPU.
14” MacBook Pro will feature a next generation ARM CPU and higher capacity configurations for RAM and SSD.
16” will feature higher end configurations with dual ARM CPUs.
Both the 14” and the 16” Pros will come with four USB4 ports, the TouchBar, better sound, better mic array, and higher resolution webcam, TouchID and FaceID.
12” MacBook will be on the mid-spring release schedule starting in 2022 after the initial release in November 2020. 14” and 16” Pros will be on the September/October release schedule starting in 2021.
There will also be a 14” MacBook Air, which will be on the mid-spring release schedule starting in 2021. The MacBook Air will feature a previous generation ARM CPU but have a better screen than the 12” MacBook and more choices for RAM and SSD.
The 12” MacBook and the 14” MacBook Air will have two USB4 ports and no TouchBar. The webcam will be of lower resolution than the webcam on the Pro models. There will also be fewer mics in the mic array than in the Pro line. The sound will also be less immersive than the sound on the Pro line. There will be TouchID but no FaceID on the 12” MacBook and 14” MacBook Air.
Apple is considering dropping the Air moniker and instead going with 14” MacBook (along with 12” MacBook), but the final decision on that hasn’t been made yet. Regardless, the 14” Air will retain the wedge shape.