Improvements in PoW come in a form of advancements in energy-efficient computation
You mean improve on how to waste energy more efficiently?
Energy cannot be wasted, just transformed.
Do you play computer games, do you watch tv, engage in sports maybe?
Do you realize how much energy humanity 'wastes' by simply existing?
Yeah, the whole Universe is just an utter waste of energy, this needs to stop, teh Big Crunch will save us

I wonder how much energy has been wasted in this circlejerk of a thread.