Apple WWDC 2018: Why announcement of new iPhone software and more is so mysterious

Apple is about to hold one of its biggest events of the year. But nobody knows quite what it's for. The company's Worldwide Developers Conference is one of the highlights of the year, during which it shows off software updates for all of its products. It can sometimes serve as the launch of major hardware products, too – last year's event saw the release of the HomePod, for instance, and new laptops are often a fixture. This time around, nobody knows whether such new products are coming.