I would love to see a wireless stand alone AOIP solution for any streamer of choise. That or perhaps a wired solution would make me choose the AOIP path.
Sorry, but IMO there is not much else that could make me pull the plug. I am way to happy with my USB chain right now. Remember that the AC mains, ground, shield and USB power is all elements that needs to be improved to hear the full benefits of USB audio. I am sure AOIP can make a difference...but not neccessarily as a complete circle.
For quite some time, I have been using USB as a digital audio path in my rig and was quite amazed at the SQ improvement after each addition of USB fixer-upper devices and told myself that nothing can sound better than this or so I thought.
But after diving in blindly and implementing the RN3 AOIP in my set-up, my initial belief that nothing can be better than USB digital audio quickly dissolved. I mean the SQ improvement over USB was not subtle at all. The artist vocals and instruments sounded so real that it was outright spooky. So from here, I walked away from usb audio devices and never looked back.
This is just my experience and if you read this whole thread, you will find quite a lot of folks who are doubtful at first but totally embraced it after giving it a shot.
IMO, the thought of using different USB fixer devices to improve the digital audio signal is a clear indication that it is really compromised and not the best path for digital music. just my 2c!