I look at Bluesound. If they can't do it (UHD bit perfect casting) with higher priced products, I remain a bit 'on the fence' about whether WiiM can pull off what they've said.As mentioned in the WiiM threads here, they say they will support lossless HD/UHD casting, but if they do, it’ll be a world first in my and others’ experience.
I have to remain hopeful though because I want this feature.