It's a "Wearable Electromyography-Based Controller" in the form of an armband, or by directly apply sensors to the user's body. It was looked into 2 years ago.
If you thought being caught by your neighbours waving your arms around to a camera andwas embarrassing, then why not go the full hog and look like a Borg cosplayer!
Muscle based controller patented by Microsoft
02 May 2012 | By Simon Priest