Just done a little experiment; gone round the house and turning sockets off, inc. the oven, washing machine, etc. Only left the fridge/freezer and the boiler running.
The base load has dropped from 92W to 25W. That's easily a 500kWh/year saving!
Realistically, it won't be that low day-to-day as some of the stuff is just going to be a pain to leave off. But Google Home's days are done I think, and there's little reason to leave the washing machine, dishwasher, etc. on standby.
Mine his 70w with nothing active but everything normally on on.
By that i mean the freezer etc isn't pumping. But router, Google home etc are on.
Actually have a lot of standby stuff
I expect a lot of smart home stuff will go for people really in a tight spot