Not exactly like that. The WebID PoC WHM doesn’t create public names or web sites with new format (RDF), it just deals with it to ignore those type of entries (RDF entries) in the MDs. Thus you should see any new public names you create with it using previous version of WHM.
As per other apps that read the public names, they need to handle/ignore the RDF entries (like the WebID PoC WHM does) otherwise it’s likely they won’t work, e.g. the email app was not yet adapted to support this, and I guess some app/s created by the community fall into this group as well.