Even as services like Whatsapp, Facebook Messenger and iMessage proliferate, SMS won't die. It is, fortunately, starting to evolve. Rich Communication Services (RCS) has the potential to replace SMS over time, offering a lot of features we take for granted in other messaging apps (like read receipts, better group chat features and improved photo and video sending). But, of course, it requires carriers to buy in. Today, Google announced that Sprint will be the first US carrier to implement an updated version of the RCS standard -- next year, all Android devices sold on Sprint will have Google's Messenger app set as default and will support the improved messaging features.