Hi Warren and welcome 
I am another Aries owner eagerly awaiting Roon and Aries integration. Auralic and Roon are definitely working together, but there is no general list of Roon Certified products as yet (see this thread).
I understand Roon will be releasing information to manufacturers at the end of this month. I’m not sure whether it will then be possible for manufacturers to update firmware and drivers so they can appear as endpoints, or whether that will require Roonspeakers. Roonspeakers will be released after Roon 1.1, but no target date has been advised.
For the moment it’s Airplay or Songcast. I can’t get Songcast to work and Airplay feels like driving a car while a man with a red flag walks in front !