There is an interesting article today on the BBC website titled Smart energy could save £8bn a year, say advisers
This concerns a report by the National Infrastructure Commission about the possible ways of changing the way we use energy.
There is a good intoduction by DECC to this subject here
Lots of clever things are possible but they do depend on Smart devices to work so there is still a long way to go.
Added Friday 4th March 2016