Many stories in the press about smart meters being readied for variable charging.
Use your power at popular times and get charged more.
Something of the kind already exists now, but I don't have a good feeling about this. Popular times are popular for a reason. People all over the country get up, have breakfast and go to work. So anything from 6am to 8am is going to be popular.
Similarly when people come home from work and have their evening meal.
What are they supposed to do? Skip breakfast? Have their evening meal at 2am to save money?
This strikes me as more of a stealth tax than anything to do with saving the planet.