That's just the capacity of the electronics, correct? It doesn't mean the internal hardware is actually eating that much juice. At least that's my undestanding.

Exactly ... as PS3 power supply can put out 360watt but real consumption data is very far from it ... real consumption is around 180watt with some peaks around 190-200watt

If you see x360 power supply data and not real consumption it is very very much more than 160watt