Based on observations, it looks like the proof of stake network will drop Ethereum's energy usage by about 99.95%. https://blog.ethereum.org/2021/05/18/country

Based on observations, it looks like the proof of stake network will drop Ethereum's energy usage by about 99.95%. https://blog.ethereum.org/2021/05/18/country-power-no-more/ https://blog.ethereum.org/2021/05/18/country-power-no-more/ It can do this because it doesn't rely on any sort of "work." It's just another internet protocol. Proof of stake doesn't have anything to do with tps, so that won't change significantly. The solutions to that are rollups (second layers that inherit the full security of the main chain) and sharding (which multiplies the capacity of rollups). Some rollup systems are in production today, capable of a couple thousand tps. According to the most recent plan I saw, sharding would multiply that by twenty, initially.