Gmail Motion – A new way to communicate – control Gmail with your body
Google, introduce  first attempts at next generation human computer interaction: Gmail Motion. Gmail Motion allows you to control Gmail — composing and replying to messages — using your body.
To use Gmail Motion, you’ll need a computer with a built-in webcam. Once you enable Gmail Motion from the Settings page, Gmail will enable your webcam when you sign in and automatically recognize any one of thedetected movements via a spatial tracking algorithm. We designed the movements to be easy and intuitive to perform and consulted with top experts in kinestetics and body movement in devising them.