We've long been used to analytics that track users journey through a website - but this technology tracks users journey through a "real" store - by tracking their mobile phones! Quite ingenious, even if I find it a bit scary, as I can see a lot of ways of abusing this...

Path Intelligence is a U.K. based company that monitors foot traffic in a rather ingenious way, through customers’ cell phones. Periodically our cell phones ping the nearby cell towers basically saying “Here I am”. Path Intelligence has built receivers that detect these signals and triangulate the owner’s location with accuracy of up to a meter. [From Path Intelligence Monitors Foot Traffic in Retail Stores By Pinging People’s Phones]