The document summarizes the results of a project that assessed the influence of smart grid technologies like decentralized storage and demand response on long-term energy system planning for a region. Surveys were conducted in Switzerland to evaluate acceptance of demand response programs and using electric vehicles as temporary energy storage. Results showed around 80% acceptance of demand response scenarios and 84% acceptance of electric vehicle storage scenarios, with little sensitivity to implementation details. Energy system modeling was also used to assess different technology and policy scenarios over 10-50 year time horizons.