Hours-long video chats can be great for staying connected to distant friends, but there's bound to be a lull in the conversation at some point. Facebook thinks it can liven up those quiet moments -- it's introducing augmented reality games to Messenger video chats in its mobile apps. As many as six people can play simple competitive titles that make use of your face. You just have to tap the star button and pick a game to let others know you'd like to play.