It may look the same outside, but the MacBook Air got overhauled on the inside.
In the case of the solid-state drive (SSD) and graphics, it's a major overhaul.
SSD: Apple appears to be one of the first to stick a PCI Express (PCIe) SSD in a thin laptop. And that makes a huge difference, according to Anand Shimpi of Anandtech.
"This is a huge deal, totally the future. And pretty much all other notebooks announced at Computex still use [Serial ATA]. Apple did the right thing here," Anand said in response to an e-mail query.
Generally, a faster SSD means faster software loads and a quicker computer boot up -- among other speed-ups.
Graphics: Intel's fourth-generation core processor, aka Haswell, is not about CPU (central processing unit) performance. It's all about the upgraded GPU (graphics processing unit).
On Monday during the WWDC keynote, Apple said the GPU has 2x the execution units (EUs). That's actually an understatement. The number of EUs jumps to 40 in Haswell's HD 5000 graphics from 16 in the prior-generation Ivy Bridge's HD 4000 graphics.
"HD 5000 [is] probably 30 percent faster than last year's MBAs," Anand said.
Higher-performance graphics generally means faster decoding/encoding of video, better gaming, and snappier updating of graphics-intensive Web pages.
And realize this is being accomplished while extending battery life. Apple is claiming that the 13-inch MacBook Air gains as much five hours of battery life over its predecessor, while the 11-inch MacBook Air gains four hours.
Apple seems to have kept the MacBook Air in the sweet spot between laptops and tablets. It's appreciably faster than a tablet but boasts battery life that gets closer to tablets than ever before.