For sure. I think a heat pump system can return around a 3-4 fold multiplier effect in terms of electrical energy in and heat energy out compared to regular resistive heating. There is however the large capital outlay up front compared with resistive heating infrastructure that costs almost nothing. The reason why it hasn't been popular in the UK in recent decades is that our gas has been approximately 3 times cheaper than electricity! So there is no advantage heating with ground source heat pumps compared with heating with gas. In continental Europe, especially Switzerland the situation is reversed with cheap (hydro) electricity and expensive (imported) gas. Hence the popularity of heat pumps. In the future in the UK? Well gas is certainly getting more expensive, somewhat closing the gap but when the nuclear decommission kicks in expect electricity prices to rise significantly. At the end of the day I think the capital costs of installing a heat pump system are going to be out of reach for the majority as the economy slows down.