If we can build plants that are as huge and complex and expensive as fission plants, then about the same effect, but without the fuel / proliferation / waste pr

If we can build plants that are as huge and complex and expensive as fission plants, then about the same effect, but without the fuel / proliferation / waste problems (which is nothing to be sneezed at). If the cost is low, a brave new world with fusion replacing fossil generation as quickly as they can be built. Energy-inefficient processes like desalination and cracking water for hydrogen become attractive. If the cost is very high, it may be that renewables have stolen fusion's market slot. In that case we'll see some national prestige projects, but against a broader renewable energy market.