The introduction of Smart Grids, a concept that combines a set of tools and techniques that are intended to make the electric power system more efficient by using renewable sources reducing the CO2 emissions, is now a day taking momentum. As a result the reliability of electricity supply will be increased dramatically, something useful for society that will depend more and more on this source of energy. In this scenario the distributed generation and the energy storage systems will be key technologies for the Smart Grids development. This paper presents the main aspects related to energy efficiency in the Colombian power system and a possible scenario way into the future in order to show important aspects of power systems evolving to energy systems. This evolution as shown in the paper will make the system better and smarter but not without solving important challenges. The evolution will bring new interesting perspective to electrical engineering which will need adjustments starting in the form that the engineers of the future are trained.