“This is not an email killer. This is a messaging experience that includes email as one part of it,” Zuckerberg said. It’s all about making communication simpler. “This is the way that the future should work,” he continued.
Here are the keys to what a modern messaging system needs according to Zuckerberg:
To do that, Facebook has created three key things: Seamless messaging, conversation history, and a social inbox. Essentially, they’ve created a way to communicate no matter what format you want to use: email, chat, SMS — they’re all included. “People should share however they want to share,” engineer Andrew Bosworth said.
All of this messaging is kept in a single social inbox. And all of your conversation history with people is kept.