I think more renewable resources will be used for Bitcoin mining and PoS is not necessary.
PoS is for shit coin and their developers launch coin network with huge premined coins. They use premined coins to stake and dominate network when block rewards are high.
Actually, the renewable sources thing is just a FUD in my opinion. Every world industry needs to make the switch, not just Bitcoin mining. It was singled out because of the misunderstanding that mining produces no value (totally wrong of course).
PoS is an alternative I think it can be done right, but agree that most coins using it now are just lazy and scammy.
This is why it is so obvious that they are attacking bitcoin and they are not really interested over the environment or anything like that, if they are that worried about our energy consumption and waht this means to the planet then every single industry must be encouraged to move to more renewable sources.
Also many people think of POW as a waste of energy when it is protecting the most important decentralized database on the world from being compromised, and that is a very important job which the majority of people will not understand until their fiat comes crashing down.