Heatpumps are great! Having a coefficient of performance equal to 4 (1kW electricity to 4kW heat) is possible today!

Unfortunately it is not as easy as just switching your gas heating with a heatpump. For one, heatpumps have a lower flow temperature, therefore a good insulation of the house is required. Also big radiators such as floor or wall are preferred.

Moving to heatpumps might start an entire house renovation which comes at a cost.