POS does not use hardware for mining, it's more similar to having money locked up in a wallet that generates interest. So if ETH changes to completely to POS there will be no POW (no more hardware mining).
You are viewing a single comment's thread from:
If so, who is going to do the necessary transaction?
Quote from ETH wiki:
In general, a proof of stake algorithm looks as follows. The blockchain keeps track of a set of validators, and anyone who holds the blockchain's base cryptocurrency (in Ethereum's case, ether) can become a validator by sending a special type of transaction that locks up their ether into a deposit. The process of creating and agreeing to new blocks is then done through a consensus algorithm that all current validators can participate in.
You can read the full article here: https://github.com/ethereum/wiki/wiki/Proof-of-Stake-FAQ