In the Google+ hangout from Friday morning at the 28:45 mark into the video, John Mueller said Google is indeed working on supporting the latest version of Schema.org, specifically Schema.org v.3.1.
He said they are working on getting that support in the structured data testing tool.
The question asked was:
When do you plan to incorporate new schemas from Schema.org v.3.1 to your Structured Data Testing Tool?
John Mueller said:
I don't know if there's any official timeline on that but i have seen the team talk about that and I imagine they're they're getting ready to to implement that as well. So I don't know what what the usual time frame is there with regards to schema.org updates and updates in the testing tool but we do know that these change from time to time and we try to make sure all of our tools adjust to to the new updates.
Here is the video embed:
Forum discussion at Google+.
