Just a side note - while the original comment wasn't directly speaking about this, and something like this requires way more precise instruments amd can't be done just from your total energy consumption, it is kind of possible to in theory decode/steal data from your PC based on it's pwer consumption, such as stealing private cryptography keys.
It's mostly theoretical and very specific attack, but I find things like that super cool so I kist wanted to share them. The whole area of Side channel attacks is cool.