Comment It's a finger-mounted "wand" (Score 1) 65
I have used and made software for a device precisely such as this one, with position and direction in space, only that it was not worn but handheld and called a "wand". This was fifteen years ago, '98/'99.
It was used for control in a CAVE environment where you are enclosed in a cube of six computer screens with the perspective adjusted to the position and direction of your 3D glasses.