Yes but still, I don't think it is worth it when you can heqt with it more efficiently than burning gas or coal.

At least in the UK, there's a massive move to heat pumps. The problem is that it's only for heating, through the usual central heating systems - so it just replaces the boiler. It's almost unheard of to have one for air conditioning. Usually people with air-con get a portable one that's only for cooling.