I'm in the UK, and got an air-to-air heat pump (more commonly known as air conditioning). It made sense because of extremely high electricity prices, and I have an insulated house without gas, electric only. There's a lot of houses / flats similar to mine, that could switch from resistive to heat pump heating. Unfortunately, the government are focusing on very expensive retrofitting of air-to-water heat pumps in older uninsulated houses, which doesn't make a lot of sense.