I've seen a lot of articles saying that Casper/PoS will be substantially better in terms of energy efficiency but haven't seen any concrete numbers. How much better will it be? 50x (still really bad), 500x (still pretty bad), 5000x (pretty good).
The reason I ask is I'm playing with a new concept I'm calling EfficientChain: Blockchain For Energy Efficiency. Instead of doing useless proof of work calculations, I'm wondering if it's possible to prove consensus through useful energy usage prediction algorithms.
The company I work for has got a relatively rudimentary algo that can predict energy consumption for a given time period based on historical consumption data + meteorology data. I was thinking we could prove consensus based on multiple nodes getting a similar result for the energy usage prediction. (Transaction being a reduction in energy usage).
If proof of stake really will involve negligible energy use (e.g. 10 watt hours per transaction), then maybe we'll scrap that idea and still use Ethereum (plus maybe Golem for doing the calculations). But if PoS is still pretty bad, we'll have to look at alternatives.