Most people dont understand what power is and to be frank, they don't give a toss. They just want to pay less for electricty while everything is left ON. Yes, people think 'it would be nice' to reduce energy consumption save the planet bla bla bla but are not really willing to take steps, like buying a power meter.
Cynical? I was at a conference the other month, what is the motivation for Euro 6 emission regulations for passenger cars you think? Well, for every extra gram of CO2 the car produces when it leaves the factory floor the manufacturer will be charges a 3 digit figure as penalty.
I am sure it looked really good on the whiteboard given all the 'green revolution' and Google wanting to stick their nose in every revolution, but the truth is, not many will want to buy one, even more the ones electricity companies give you 'for free'.
This is why, IMO, the Google power meter failed.