More About GoodRelations Integration

Are there deeper and more definitive statements about the meaning of the integration of GoodRelations with Schema.org?

Does it mean simply that the entirety of the GoodRelations ontology (at http://purl.org/goodrelations/v1) has been 'imported' into Schema such that Schema is now a new namespace for all GoodRelations classes and properties?   Is there ever a reason to again use the gr: namespace?  Will GoodRelations, as such, be retired?  If not, will the two vocabularies remain in sync?

Or, does "integration" in addition mean that any GoodRelations domain vocabulary is ipso facto a legitimate, recognized extension to Schema?  For example, is an appropriately referenced class from the Vehicle Sales ontology (say, http://purl.org/vso/ns#Automobile) honored as a valid, spidered and rich-snippeted entity?  If so, are there rules and models for intermingling vocabularies?  

What comes after the press release?

Rob