A key advantage that Amazon has over other online retailers is the free two-day shipping included with a Prime subscription. According to The Wall Street Journal, retail giant Walmart wants in on the e-commerce and quick shipping game as well. The company was already testing the concept with its ShippingPass option that handled three-day shipping for those willing to pay $49 a year. Now, starting Thursday, those members will get two-day delivery for the same price. Of course, that's half of what Amazon's $99 annual Prime subscription costs. Amazon's plan includes other extras, though, like streaming streaming music, video and more.