Electrification - the potential for increased electricity demand due to new services and the shift from any non-electric source of energy to electricity at the point of final consumption - is a major emerging trend in energy markets around the world. Select driving forces for this trend are a collection of newly-improved electric end-use technologies, engaged consumers and manufacturers, and a variety of economic and policy objectives in different jurisdictions. NREL and partners are conducting a multi-year study of electrification scenarios, which will explore research questions related to the potential key technologies for, planning requirements for, and impacts of deep electrification of the U.S. economy. NREL recently published a report that presents scenarios with various degrees of future electrification in all major end-use sectors of the U.S. energy system, and quantifies impacts on the amount and shape of national and regional electricity demand. In addition, ongoing analysis is exploring how the U.S. electricity system could need to transform to meet changes in demand from an electrified economy, the potential role of demand-side flexibility in supporting reliable operations of a clean electricity grid, and the potential costs, benefits, and impacts of mass electrification. This talk will serve to frame some of the overall boundaries of the session and report on electrification levels and impacts under a variety of scenarios.