6. The method of claim 3 , wherein: the detecting one or more interactions includes performing skeletal tracking; and the one or more interactions include the person associated with the mobile device touching the particular person via a handshake, the mobile device comprises a head-mounted display device.
6. The method of claim 3 , wherein: the detecting one or more interactions includes performing skeletal tracking; and the one or more interactions include the person associated with the mobile device touching the particular person via a handshake, the mobile device comprises a head-mounted display device. 7. The method of claim 6 , wherein: the virtual data includes a text description displayed to the particular person.