This IDC Presentation provides a backdrop for the market forces driving network virtualization, and the growth in the adoption of hybrid WAN and software-defined WAN (SD-WAN) enterprise requirements. It defines the SD-WAN market and its components as well as examines enterprise trends and drivers for adopting SD-WAN services. What market opportunities do new developments in SD-WAN mean to the communication service providers and network infrastructure vendors? What are some of the enterprise use cases? The Presentation precedes an interactive panel debate with two CSP and two vendor representatives that addresses the business and technical challenges, opportunities, and implications to these stakeholders that are competing in this SD-WAN segment. This IDC Presentation was presented at the GEN15 Ethernet/SDN/NFV event in Dallas on November 18, 2015.