Ethereum is planning on making a huge move to Proof of Stake.
Here is an explanation of how Casper, Ethereum's Proof of Stake algorithm, works with validators. There will be a part 2 explaining how the rules of Etheruem's Proof of Stake will work, and the implementations on Ethereum's future.
If you have any questions please comment below
If you want to learn more:
-Vitalik Buterin recent post about Casper and Proof of Stake:
https://medium.com/@VitalikButerin/mi...
Great Overview about Proof of Stake, Ethereum mining, and Ethereum's Future:
https://www.ethnews.com/proof-of-stak...
Ivan's technical explanation of Casper, Ethereum's Proof of Stake:
( Ivan is coding Casper and knows it best)