What exactly does "sunsetting consumer Google+" mean? The blog post wasn't particularly enlightening. Are they shutting down Google+ as a social network?
They will keep it active as an internal network, but regular old joes won't be able to use Google+ anymore.
Probably, but the key point made in the article is that it will continue as an enterprise product, not just an internal one (though presumably Google is one of the enterprises that will continue using it.)
FTA: Action 1: We are shutting down Google+ for consumers. seems pretty obvious that's the case.