the whole proof of stake situation is tricky, many people including myself are totally against proof of stake, but yes the ethereum foundation has said they would like ethereum to go pos so if the majority of the community is wanting this it will probably be by the end of the year. but I think there is a lot of discussion around whether or not they will even be able to successfully pos because so many people are against it and the miner might not like the idea of it.

this is the same issue ethereum will probably have when they decide a coin limit.