50 or 100 years from now we may run out of solar and wind resources to tap. We may consume a couple order of magnitudes more energy than now. Materials science may have unforeseen advances that make nuclear development safer and cheaper.
Nuclear will find its place in the sun - so to speak - at that time. But not now I think. The numbers don't work.
Surely in this magical future sci-fi land we also have new ways to create and store energy. Of all the issues with renewables this (space/land) is currently not even worth worrying about.
