Not sure why this is being down-voted. From Wiki:

>>A succubus is a female demon or supernatural entity in folklore (traced back to medieval legend) that appears in dreams and takes the form of a woman in order to seduce men

I believe that it was as much social as technical issues that held back Glass. Like it or not, we can surely expect social push-back on a VR device which will make its users appear to onlookers as almost masturbatory.