Energy demand is on the rise all over the world. This presents core challenges for a sustainable energy system: flexibility, security of supply, affordability, climate protection, and resource efficiency. In order to meet the sustainability challenges, measures must be taken along the entire energy conversion chain from the utilization of fossil fuels and renewable resources for power generation and transportation to improvements in consumption. What will the energy system of the future look like? How can we prepare for the coming changes in the energy landscape? What transformation should enterprises undergo in order to remain competitive in the existing and new market realities? What role do decarbonization, decentralization and digitalization have to play in shaping the new energy system?