Amazon's smart shopping cart knows what you're buying

In its bid to further automate grocery shopping, Amazon today unveiled a smart shopping cart that can automatically detect products placed inside it and let customers pay for shopping without visiting a cashier. The “Dash Cart” — the company calls it — looks like any other grocery cart, but uses a mix of cameras, sensors and a built-in scale to work out a person’s purchases and then deducts the total amount from the card associated with their Amazon account. The process might sound familiar, especially considering Amazon has opened a number of automated Go stores over the past year.