Face recognition would be the killer app. I would hand over a month's salary to get a device that simply converted from face to name. Nothing else, it doesn't

Face recognition would be the killer app. I would hand over a month's salary to get a device that simply converted from face to name. Nothing else, it doesn't have to bring up their facebook profile, twitter feed or anything else. It could even rely simply on entries I've entered myself, knowing someone before they've introduced themselves would be creepy. But just something so that when people remember me I don't stand like a dick because I can't recognise their face would be nice.