Soooo then in 40 years what will replace Nuclear? LNC? Because it seems Renewables are a long way from being able to carry a base load and even if they could, the land and resources required is staggering.
Nothing needs to 'replace' nuclear (although we may improve reactor technology..)
Long term, we may start to use Nuclear fusion (which has a lot of technical problems to overcome but has a lot of upside.)
Biofuels may take a bigger role, since at least some of that could be done using water rather than land.