Airplay works on top of wifi and it can't play multichannel audio. Not to mention the crappy experience when the video is "buffering". Hopefully this standard will fix such issues but I have big doubts.
I thought this too until recently, but Airplay does, in fact, support multichannel audio in sync–but only through playing music to speakers through iTunes Desktop [1], as its the only client to officially implement it. Of course, we don't see more multichannel Airplay clients because it is my understanding the standard is proprietary...
Is there ANY multi channel client? I tell you: no! And it can't really be because Apple specifically limits AirPlay output to one single destination. It's because wifi sucks and as it is and it just can't work on multi channel(things will get out of sync, some channels will buffer while others will play etc). If you read the avb specs you will underatand why. Wifi needs hw changes.
