Isn't there any better/more efficient methods of generating electricity from fission/fusion than basically using the heat to boil water to spin a turbine? I know that that there are different generations of nuclear reactor designs (with each more efficient than the last) that get better and better at extracting the heat from the reaction. But at the end of the day, for pretty much every design I've seen, you still use that to boil a liquid, which spins a turbine. It seems too much like just a coal plant in that regard. Or am I being too critical, and that the current paradigm is already very efficient at turning the nuclear energy into electrical energy?