I guess my point on heat was that a thing that I think needs to be done with all of these monitors is to add other kinds of household energy uses (like nat gas, oil) to the electrical data already being captured.

Natural gas is usually delivered in units of energy called "therms", oil is delivered by the gallon (or litre), and electricity is delivered by the kWh -- all of these measures of energy can be converted into kWh so could be displayed together in a single display.