How will they save me money
I had mine installed for the convenience of getting my meter read automatically, without the need of visits from a meter reader.
When it was installed, the technician also plugged in the user display, and supplied a book of instructions, which he suggested I might like to read if I wanted to use the display. The inference was clearly that most customers ignored the display - hence I can't see how it is going to save money.
Presumably some guru has assumed that the displays will be used, and we will pay much more attention to the way in which we are using power. Possibly we will be so horrified at the cost of boiling a kettle for a cup of tea that we will cease to be a nation of tea drinkers - so saving on power and the cost of tea bags.