Live streaming is all the rage these days and there are a variety of services, like Twitch, YouTube Gaming, and Smashcast, that allow gamers to watch others or show off their own gaming skills to others. Microsoft has been working on their own service, originally called "Beam," that's gotten a major overhaul along with a new name. Now called "Mixer," four gamers can pool their streams together into one broadcast (dubbed "co-streaming") for some co-op friendly streaming.