I worked for the electricity supply industry for a long time, after that I was an electrician / electrical engineer and subsequently ran my own business and taught electrical.
Now going back many years, I was told that the unit cost of electricity was a guesstimate as there is no way that an audit could be done. It gets worse, initially the government made the cost per unit and it has "just gone up from there!
Here in France it is just as bad, many supplies are nuclear, nobody has worked out the cost as they do not know how much it will cost.. In the UK some suppliers are using chicken sh1t, however these units are actually gas stimulated, eg the gas is helping the "fuel" to burn, do not get me wrong, it is a good system, but again no one has costed the real cost out.
In fact it MAY be more economic to run a generator when one considers all the infrastructure costs, breakdowns, losses.
These meters still will only record your usage and be able to forward the info to who ever and regulate your supply. Hopefully they also will record low voltages, power outages, spike etc. but I bet they do not. THAT would be to YOUR benefit!
I am currently looking at different things, like charging batteries at night on the off peak, turning fridges and deep freezes off 2 hours before the off peak comes on to force off peak usage, water heating from solar, and lots of things on 12 volt (modem, phones, TV's, computers, etc)