9to5google.com have posted with information saying Google plan to kill off Voice in favor of integrating the function into Hangouts.
Im very pleased about this because since voice was removed from Google+ (which worked with my car bluetooth as well) I've been having to use Hangout Video which isnt always the best - both on data usage and call quality.
So its about time this happened, VoIP seemed to be forgotten 'bout by Google, this is a welcome change for us international users at least.