Even when it's empty, your shopping cart might know everything about you.
Prasatporn Nilkumhaeng/Getty
Gone are the days of running into a store to grab a quick carton of milk. Now retailers want to track every element of your experience in their stores, from your spending habits, to your location and now even your heart rate.
Walmart has patented a design for a "biometric feedback cart handle" on a shopping cart that could measure a shopper's heart rate, temperature, speed and the amount of force they apply to the handle as they walk around a store.
The patent application, submitted on Aug. 23 and spotted by Motherboard, shows the cart would first measure "baseline" biometric data and then compare data at different points in a shopping visit to this baseline.
The data would then be relayed back to a central server and, if it indicated the shopper was "not satisfied," the central server would send an alert to a shop assistant to go and help the customer.
A 100 percent real diagram in Walmart's patent showing how the new biometric shopping cart would work.
Walmart patent
It's a sign of how smart our stores are becoming, and just how much data retailers want to collect. Shopping centres are already using Bluetooth beacons to track customers around stores, and new technologies like gaze detection could even tell companies what's grabbing our attention in a window display or how we feel about a product lineup.
For Walmart, which is investing in blockchain to track food suppliers and which has already patented technology to eavesdrop on customers in stores, it's another sign that retail is changing.
Who knows what the future holds? Targeted advertising to get you in-store for Walmart's next big sale and then a shopping trolley that knows exactly how fast you run to grab the bargain?
Now playing: Watch this: Beacons: What they'll do for retail
3:31
Follow the Money: This is how digital cash is changing the way we save, shop and work.
CNET Magazine: Check out a sample of the stories in CNET's newsstand edition.
