The lack of audio passthrough has been so frustrating. Apple TV would be an instant buy for me if it did. I have a pretty good 5.1 setup at home. I've been watching the LoTR trilogy with my kids and there is a big difference between DD 5.1 vs the higher quality audio streams. I use a Shield for this reason, but it's clunky and I'd much rather have something that just works. Shame that Apple has no interest in supporting audio passthrough for their devices.