The only technology that can significantly reduce the use of electricity, is the LED, in the home, in industry and commercially. See, Only LEDs Can Significantly Cut Electricity Usage.
Using data to know when to turn on the dishwasher is not the real opportunity.
Controlling home appliances and other equipment has frequently been referred to as the Internet of Things, but it is too narrow a concept.
The importance of data isn’t that it might reduce the use of electricity. The real opportunity lies in improving quality, reliability and lowering costs … for both companies and customers.
General Electric Company appears to have embraced this concept faster than most companies.