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If it were that simple we would have unlimited free energy by simply using heat pumps to power steam turbines.

I don't think heat pumps can generate very high temperatures efficiently.

Resistive heating is 100% efficient by definition. There is almost no energy lost. the only loss of energy is light generated.

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Resistive heating is 100% efficient, yes, but the electricity required to power the element is rarely above 40% efficient for most combustion powered sources (combustion turbines, combined cycle, etc.).

The thermal losses at the power plant are kind of a bummer.

(My vague understanding is that heat pumps are not cost competitive with natural gas for winter heating)

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