The rumors were apparently true: Google's unified chat platform (widely nicknamed Babel) is launching as part of a Hangouts redesign. The new service focuses on conversations that carry over from device to device, including notifications and shared photos; contacts are still there, but they're pushed to the side. Live group video is new, too, while text chats make it clearer as to who has been reading and typing. Android, iOS and web users all get access to the updated Hangouts today.
Source: Engadget