Haters just looking for an excuse to ban Bitcoin mining, nothing else. For that reason, I don't think Bitcoin will replace by PoS technology. Because Bitcoin isn't controlled by a team that can move it easily. Miners would just move to reasonable places where mining Bitcoin is low cost and legal. They can't stop Bitcoin anyway, just trying to dump it.
I don't think this is about the haters and the excuse to ban mining
This is really environmental concern but compared to all other environment destroyers I don't think that Bitcoin mining has the key impact. So, I don't think environment will be the show stopper for Bitcoin mining.
However, I think that all Bitcoin users and miners shout be more aware of their impact om environment and try to find the way how to contribute to its protection.