Never mind Android Pay and Apple Pay -- Walmart would rather you use its own mobile payment service. It's launching Walmart Pay (how creative!), a payment system that has you scanning QR codes within its app to make purchases. It's not the most elegant method as a result, but the upshot is an approach that works on most phones, in any checkout lane, with any major payment card you have. And despite what it looks like, Walmart swears that this isn't meant to muscle out other mobile payment services -- they could be integrated "in the future."