Exactly. Which is why I left it off of this list.
I believe the Sony that's being discussed in the other thread (XA5400S) also does DSD across HDMI.
As to whether or not it does "indigenous" DSD, the product sheet doesn't say. It hints at it (that it does), in the block flow diagram, but the fact that it does the jitter reduction and "hyperstream DAC" after that would indicate to me that you are correct. It could be just shorthand (for two different streams handled similarly), and heck, it might even be a more DSD-type DAC than a PCM-type DAC. Unlikely, though. Hard to tell. Will have to do more research.
EDIT: Well, no, it also says right in the product sheet that the Hyperstream DAC is a 32 bit DAC, so you're right, it's converting it to PCM. So I agree with your conclusion -- that trying to keep the DSD stream as DSD is an exercise in futility.