There really should be a penalty for gratuitous waste of resources. Energy consumption is neither free nor without adverse impacts. The era of planed obsolescence, bloatware expanding to gobble up and justify ever more hardware is over. A fresh take on the desktop given the monstrous devices that are now available in terms of cpu, memory etc may completely redefine the footprint of personal computing
There are applications that are extremely vulnerable to energy saving crap. Anything real-time is simply going to need to consume more power. Waiting 15.625 milliseconds completely breaks some applications.
You will take timeBeginPeriod(1) and friends from my dead, cold hands.