Tim Higgins discusses his new book "iWar," examining how one of California's corporate crown jewels, Apple, faces an unprecedented rebellion. Tech leaders such as Spotify's Daniel Ek and Epic's Tim Sweeney are waging a legal war over what they have portrayed as a shakedown operation — the 30% App Store cut that generates massive profits for Apple while stifling competition. As this battle imperils Apple's hold on the mobile world, the rise of artificial intelligence is threatening to potentially displace the smartphone era altogether.