For those of you following along with John Robb's Resilient Community work over at GlobalGuerrillas, such a system would be ideal for the MicroGrid concept - a plug-and-play power source that lasts for decades, requiring a small staff and little maintenance to the reactor system. No long outages. The fuel economy of these sodium-cooled designs is proven. No waste worries as Toshiba will take the entire core out and send it back to Japan for reprocessing.
This, in my opinion, will be a big deal after we move through what I expect will be an ugly transition period over the next 4-6 years. As we shape the kinds of communities that will thrive in the coming New World, power systems like the 4S (and other small nuclear systems) will have the potential to play a key role in keeping the lights on, keeping the computers computing and giving an edge to the communities that benefit from it.