As the economics continue along Swanson's law (the photovoltaic solar panel equivalent to Moore's law of ever decreasing costs) I expect the biggest obstacle to

As the economics continue along Swanson's law (the photovoltaic solar panel equivalent to Moore's law of ever decreasing costs) I expect the biggest obstacle to large scale transition to a distributed grid of majority local generation resources will be regulatory hurdles by legacy utility industry to protect their business model. Some of these initiatives may even be channeled outside of the legislative process such as some DOE proposals under current administration to protect coal generation. Sorry this might go counter to the intent of this question but I think I'm getting at is that the single biggest factor will be political, and that the voting box is our strongest lever.