Facebook is clearly eager to check out new interface concepts these days. Just months after its acquisition of Oculus VR wrapped up, it's buying a speech recognition company, Wit.ai. The social network isn't saying just what it plans to do with its new purchase, but Wit.ai's focus has been on a platform for voice-guided natural language interfaces. It's not a stretch to see Facebook giving you ways to dictate your status updates or chats. Also, voice recognition is particularly important for virtual reality, where you can't always reach for a keyboard -- this may play an important role in Oculus' immersive experiences going forward.