There will be some who want privacy and some who want total transparency in all transactions.
I think it's safe to say that there won't ever be a main net implementation of any sort of privacy features with how governments are likely going to outlaw all privacy centric incentives. I personally don't even see the point of having privacy features implemented in Bitcoin. Its open nature is what makes governments somewhat have an open minded stance towards Bitcoin.Plus you need consensus to implement changes on the main chain- not a quick process.
While a large group of people consider that to be a negative aspect of Bitcoin, I personally find it to be one of its strongest points. It's not one party deciding what's happening, which isn't something that can be said about other altcoins (hint hint... bcrash). I think in the end, if there are certain features that do enjoy proper usage and that on a consistent basis, and thus aren't gimmicks meant to trap in investors, we might *eventually* see them be implemented. 
