Generation, microgrids and strategic storage can provide reliability and security and distributed sensing can offer unprecedented system visibility. Integration of DERs requires continuing innovation in coordinated control, optimization, and modeling, and technology to enable the participation in regulation and balancing services, ancillary service markets and distribution system management. How these customer-suppliers will interact with DERs and the larger power grid is still evolving rapidly. Researchers and the industry are starting to realize the potential of data analytics, as well as the potential for distributed and transactive decision-making. There is also increased recognition of the potential for DERs to improve energy-system resilience in the face of extreme events.