I have personally used a similar device and administered research on the ability to train yourself to control interfaces using EMG readings at a muscle site. A

I have personally used a similar device and administered research on the ability to train yourself to control interfaces using EMG readings at a muscle site. A challenge to making this attractive as a consumer product is it required an adhesive electrode pad, and doesn't work so well if you are hairy where the electrode needs to be. If this isn't resolved with this new armband, that could be why they aren't showing much.