Re:iOS 8 randomises the MAC address while scanning for WiFi ...
by dag11 on Sunday June 08, 2014 @05:49PM
(#7866031)
Large stores use it to positionally track unique customers. They can analyze the paths they take and ultimately what they buy. This is powerful because the can optimize the layout of their stores to maximize sales based on hard data.
This will now become much more difficult to do.
My guess is that the stores that are using this tech are mostly concerned about how long the average person has to wait in the checkout line, not whether Joe Blow is was in the store.