According to KGI Securities analyst Ming-Chi Kuo, Apple will be rolling out a new MacBook Air with a lower price tag this year. The lineup is certainly due for an upgrade, as the latest models are still running a Broadwell chip from 2014-15.
Aside from obvious internal upgrades like processors and graphics, another area that could see improvement is the display, as the MacBook Air currently offers a 1440 x 900 non-Retina display. We’ll likely also see some USB-C/Thunderbolt 3 upgrades and perhaps an overall redesign given the age of the current design.
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Source: [H]ardOCP – Apple to Launch Cheaper MacBook Air in 2Q 2018