You could say that about any number of human activities, though. "Geez, all these game conventions use so much power, can you imagine how much coal is being use

You could say that about any number of human activities, though. "Geez, all these game conventions use so much power, can you imagine how much coal is being used to power all these lights and booths right now?" If anything, having the monetary system tied to the power efficiency of computing devices should greatly incentivize increasing their efficiency further. Edit: Downvotes aren't supposed to be used for disagreements, but whatever.