"There are powerful, powerful insights here," said Denman. The technology can also be used to analyse crowds, spotting who is looking at big-screen advertising at a sporting event. The software can also detect the race, age and gender of who is looking. Once you know who's looking and when, Denman argued, you can sell advertising based on in-depth knowledge.

http://www.wired.co.uk/news/archive/2015-11/23/ken-denman-emotient-wired-retail-2015