To answer your question, I'll go tomorrow to largest Sony Center in Moscow with handful of headphones and devices to see it all on the real battleground.
I am curious too, how this will turns out.
Also, I am interested in whole LDAC ecosystem and will test Sony Experia smartphones, digital Walkmans and this DN-1080 aka
'BIGGEST BLUETOOTH DONGLE' I know.
As far as I know, all these Sony devices supports either standard SBC or proprietary LDAC.
Still, I'll bring APTX Marshall Major to table to try.
I searched for almost a month, and it seems, the only stationary option to transmit LDAC would be only this monster: