The New iMessage Is Great. But Why on Earth Isn’t It on Android?

Apple’s big messaging moves were among the biggest and most unexpected announcements of Tim Cook’s WWDC keynote Monday. iMessage gained a host of features, from “invisible ink” that hides a message until it’s swiped, to in-line Apple Music links that play seamlessly in-app, to “digital touch,” which lets you send images you draw, or even your heartbeat. It’s also, like Facebook Messenger, now open to third-party developers.