I don't think the tangent off into the topic of cloud-based computing makes a lot of sense. PUE is a measure of efficiency for the data centre itself — how muc

I don't think the tangent off into the topic of cloud-based computing makes a lot of sense. PUE is a measure of efficiency for the data centre itself — how much power is going into computing vs the data centre. It says nothing about the efficiency of the hardware itself, which can easily beat the efficiency of consumer hardware by enough of a margin that it burns overall less energy. One obvious place for such savings is storage — there's no reason you need a separate copy of a game for each compute node that's running it! Then they run into the problem of e-waste, which is precisely the sort of thing that cloud-based/streaming consoles would actually make better!