Facial recognition flash

I was just thinking about this - many compacts have facial recognition which could make getting the dorrect exposure easier - assuming a certain skin colour of course .
The biggest problem with flash metering is knowing what to meter off .
Nikon's new 2012 segment metering is perhaps a step in the direction of eventually being able to have facial recognition built in to the camera meter , as with live view , which could result in much more accurate flash exposure if the camera can differentiate between what is and isn't a face .