Why are heat pumps suddenly getting so much attention? Here in Australia they have been common for at least the last 20 years. Most new houses have been fitted with heat pumps, or as we know them, reverse cycle air conditioning.
They are effectively electricity generators, using electricity to heat and generate more electricity. In typical Australian winter even slightly below average outside temperature means they are generating more than they are consuming.
They definitely have a place, but they are not as good as they are marketed to be.