Here's a look at Walmart Pay in action

This time last year, just as Apple Pay was being launched, tech enthusiasts were pouring scorn on rival payments system CurrentC, because it depends on barcodes rather than the newer NFC wireless technology picked up by Apple.The jury is still out on CurrentC -- a year on, it still hasn't launched -- but on Thursday Walmart announced a payment system of its own that uses barcodes, and it doesn't look too clumsy.In a video provided by the retailer, a customer starts an app on an Android phone wit