Blizzard is teaming up with Facebook to offer integrated livestreaming in its games. Once you connect your Facebook account, you'll be able to stream to your timeline, and friends can subscribe and receive notifications about when you're streaming.
"Blizzard games are best when played with friends, so it's important to us to provide our players with features and services that make it easy and fun to share their experiences with each other," said Gio Hunt, executive vice president of corporate operations at Blizzard Entertainment. "We're working closely with Facebook on this integration for Overwatch, as well as our other games, and we look forward to sharing further details on our plans as development progresses."
The developer and Facebook are working on the functionality now and although no timeline is specified, Facebook Login will be implemented later this month, so possibly it will launch then or near after.