Amazon's exclusive reign in fast fulfillment is coming to an end. : Pioneering "micro-fulfillment" company Fabric, which has been something of a darling among investors, just passed an important milestone with a valuation that exceeds a billion dollars. The company uses robots and geographically strategic fulfillment centers to get products to customers in a hurry, as quickly as one-hour after an e-commerce order is made. Is the company the future of fulfillment in a world that previously has been dominated by Amazon? Investors certainly seem to think so.