I think there are two facets to this issue: generation capacity and consistency in generation. Nuclear power plants have the capacity to generate huge amounts of electricity, on average almost 12 billion kWh (eia.gov). That is a huge amount of electricity, especially given the amount of land it covers. Nuclear power is also very consistent in its generation, able to provide electricity for 24 hours a day.

I believe that renewable energy sources will play a huge part in the next century, and each type will have their own niche depending on many factors. Location, availability of resources, local economy, local energy needs will all come into play, and can determine just what types of energy generation will be needed. Every corner of the globe could benefit from one, if not more, types of renewables, and the entrepreneur who is able to take advantage of those opportunities will have a clear advantage.