Right, sorry, I did not fully read the pdf of what my friend sent before posting!
It does look more like a USB DAC, with an interesting twist - Bluetooth as a connection option.
Still would need some significant silence for the PC though, as it does not appear that you can change the tunes without the PC, so it would have to be in the same room.
Once I see the guy's setup, and get a feel for how he uses it, I will report back.