Put a UPnP or OpenHome renderer inside it, so I could stream to it from the server software of my choice - J River, minimserver, whatever. I don’t want to do volume control at the sending end, I would want the speakers to get the original datastream to do their magic on, and while an app for volume is ok, it’s not ideal - you have to switch into it, your iPad might have gone to sleep, whatever, so a conventional infra-red type remote control would be more sensible. Even the ancient Squeezebox Touch has such a thing, so it’s not difficult. It is just frustrating that they’ve quite sensibly put ethernet connectivity into them, so they sit on your network like a printer, but then not made it possible to send music to them over the network. Other people would probably quite reasonably want them to be an Apple Airplay endpoint too. Then you could cast stuff directly from your iPad or your iPhone. The concept is great - a speaker that goes on your network, they just need to work it through. Buying another DAC to feed them is just silly. I suppose you could get a good bit of what I’m talking about by sticking an Auralic whatever round the back, but that would still leave the volume control issue, and be a bit restrictive in terms of control software. If you bought a printer would you expect to have to buy anything else to get it to print from anywhere on your network?
(BTW I am genuinely interested in them, I was just trying to get my head around how I would want to use them.)