The smart grid is absolutely critical to both in fact. At the localized level, at the level of distribution to individual households, smart grid technologies are critical to doing things like being able to plug in your electric vehicle at night and have it be used as a battery for the grid as a whole and then unplug it in the morning and still be able to get to work. Smart grid technologies are critical there.
In the broader scale and in terms of transmission, we want to be able to manage a higher degree of variability within our broader transmission lines. Now we tend to use less than the total load that a given line is able to carry, based on engineering parameters, but if we know more about what's happening at any given time along that transmission line, we can actually get more electricity and a more variable amount of electricity across it, and that allows us to better utilize the resources we have.