Startup Idea : Store contacts based on how you know people - app

This idea came in to my mind when I was in a meeting in my new work. Everybody introduced themselves and obviously everyone forgot every other persons name and whatever information they shared. So here it is, What if we used an app, where the users shared their info (whatever they want to share. i.e. name, occupation, location, project) and the other users of the same app in the room could open up the camera in that app, and see all the details of every user right on top of their head? Sounds familiar? Yup, we all have seen something like this in the Hollywood sci fis. But in reality, how possible is it to see a person through a phone camera and have all his information floating next to his face? hint: we all will have to use Bluetooth/same wifi network. I have not been able to figure out how this idea can be brought in to action. Please share your thoughts! Humayun