Apple Inc. AAPL is betting big on design with the launch of the iPhone 17 Air, its thinnest smartphone yet, a 5.6mm device that executives call a dream realized, but one that also challenges buyers to weigh fashion against functionality.Apple's Thinnest Phone YetUnveiled at Apple's Cupertino headquarters, the iPhone 17 Air is 36% thinner than the iPhone 17 Pro, lighter than a Cartier "Love" bracelet and only slightly thicker than three stacked quarters, reported the Wall Street Journal."It's something that ...