We are on air sourced heat pumps. I think the US is really behind in thinking about creative geothermal like borehole heat pumps which act as a thermal battery (pump heat into ground in summer, extract it in winter.) They work but I can't imagine they are the best solution in my climate zone.

Also, for energy usage is seems appliances could use innovation. Why am I not recapturing the heat from my clothes dryer? Why do I have a separate refrigerator (heats house) and water heater (cools house) inside my house?

We tried a heat pump water heater but it was a total fail, as it is equivalent to putting an air conditioner inside your house. We had it in the ground floor of our walkout, which even in summer never breaks 70 degrees. Kids were complaining and actually turning the heat on...