Google glass, Think about someone inventing a app that can utilize the built in camera and read facial features and be able to identify people due to that function. Now step it up and utilize the mic to listen the the convo's and take out key features of the person's identity.
You go to a speed dating place and meet Tom.
Tom says, "Hey I am Tom, I work for Nasa, I Love long walks on the beach, And drive a H3 Hummer got to save the world you know."
Then you meet Bill.
Bill says, " Hey I am Bill, I don't work, I like TV, And I'm saving up to buy a Bicycle so I can get a job."
Google glass would have taken a pic of both their faces and categorized their info... If you meet Tom on the subway and he walks up and says "HI". You wont have to go [were did I meet this man]. Google glass would tell you, you met him at this place this time he like this this and that he lives at p sherman 42 wallaby way, sydney His phone number is XXX-XXX-XXXX.
If you see a Person of the other gender that strikes your fancy, Google glass would beable to tell you. This is Sally Smith she is a major in art and XXXXX University. Ps her facebook status says In a relationship.
You might think this is beyond creepy, I think someone on this site with more programming skills then me is now rich.