NOC's.....
The devices are themselves only the tip of what is an enormous iceberg.
I work for a 'telecoms supplier' and spend a lot of time in server rooms. These things chew through power like water over the edge of Niagara.
The 'typical' purple clad server is geared up to run at between 500 and 1000 watts, depending on the Config.
Two or three of these in one cabinet, plus the drives, plus the back ups, plus the air con' units, plus the……
Assume 50 cabinets per NOC [a round if conservative figure] all running 24 hours and one plus, in a small bungalow in Weston Super Mere powering a small Finnish mobile is, in the grand scheme of things, irrelevant.
What is really needed is some sort of joined up way of producing the power in the first place, using all the different 'green' technologies -wind, hydro, solar et al-, having people generate some / most / of their domestic needs through their own green generation -again, solar, wind etc- thereby encouraging users to 'value' the power they consumer by understanding more about how it is made.
There also needs to be a drive the Government UK to force Britain PLC to start actually making some of this green technology, not just importing German windmills and Swiss turbines…...