I wondered this, too. I have 3 AA products, in different locations, so I wouldn't necessarily need the RAAT, but if they worked, I'd use it e.g. in moving them around for the occasional multi-room use. Mostly, I'd want to drive them independently in separate locations.

I signed up for Roon yesterday, and will need some time to get the rest of my setup configured/updated. In the meantime, does anyone out there already know the answer?