30 years ago Apple announced the Mac. Back in 1977 they'd helped spearhead the personal computer revolution with the Apple II, putting a command-line interface into homes and onto desks in a way that had never been possible before. In 1984 the Mac did the same for graphical interfaces, harnessing the power of the mouse, pointer, and windows to make computers even easier to use. In 2001 Apple expanded into music, unleashing the iPod + iTunes, and kicking off the mobile entertainment revolution. 2007 marked perhaps the most important announcement in Apple's history, when they took elements of their existing businesses, personal and mobile, and revolutionized the phone with the iPhone. 2010 saw Apple bridge the gap between iPhone and Mac, and once again made the computer even more personal, with the iPad. Any of those would have been the achievement of a lifetime. All of them, the achievement of Apple so far. But after over 30 years of making the computer even more personal and mobile, what on earth could follow? What else in our digital world, what of the magnitude of the computer or the phone, could Apple revolutionize next?