A good review from Jason Snell:
The introduction of the new MacBook Air hasn’t simplified Apple’s overall product line—there’s still an old model and the MacBook hasn’t been updated and that 13-inch MacBook Pro without Touch Bar still feels like a weird outlier product that should have another name. But I think the MacBook Air does simplify the Mac laptop buying process, in that it feels like the best starting point, the center of the Venn Diagram of MacBooks.
Still, Apple has placed the MacBook Air back where it spent the first part of this decade: firmly at the center of the Apple laptop universe. It’s not the cheapest or fastest or lightest laptop, but it’s the lowest-priced Retina Mac and it’s powerful and flexible enough to serve the needs of the broad audience for consumer Macs. The new geographic center of the Mac is once again where it’s been for most of this decade: It’s the MacBook Air.