I kind of agree with you there is only enough area for solar for 150 million people (even if we assume all land is solarable) but there is no reasons we couldn'

I kind of agree with you there is only enough area for solar for 150 million people (even if we assume all land is solarable) but there is no reasons we couldn't eventually have everyone with a milion Claudes with fusion. Edit: There is a problem with that - 10MW * 8 billion is something like half the solar power from the sun which implies wasted heat will heat earth considerably.