The idea behind proof of stake is that miners could always go higher or lower depending on difficulty, even at one dollar per ethereum the miners could still profit if the difficulty is low enough, however when staking is the subject the more you have it the more you will stake it and make money, hence if you have 100 ethereums you will stake more compared to 1 ethereum.

It means there suppose to be more people who will have ethereum and hold it on their own wallets and stake it constantly 7/24 which would make two great potentials for ethereum.

Firstly, it would mean there will be a lot of wallets staking the coin helping the transactions which could potentially drop the fee for transactions which was already low, plus it would also create a lack of sellers because people will want to keep it on their wallet and not constantly sell or trade it. I believe it will have a better future with this, maybe not right away but long term.