Methinks the "killer app" for Google Glass et al is automatic face recognition and dossier summary display (look at someone, and a "bubble" of information is sh

Methinks the "killer app" for Google Glass et al is automatic face recognition and dossier summary display (look at someone, and a "bubble" of information is shown above them); unavoidable when its time comes, and will be exploited by those already data-mining all kinds of app usage.