I can imagine being a developer on this product would be insanity. They probably implemented the Airplay feature, showed it to their bosses and for whatever reason the higher-ups had their reasons for nixing the second screen... Then they thought -- Ok, so we can't do video but perhaps people would want to airplay the audio to their fancy pants audio setup in their homes, better than nothing, right? Wrong.
I hope the big media companies get their acts together. They only get to screw up a finite number of times before someone comes and blows them out of the water
I don't think they use the standard video player though. It may have changed recently, but I noticed that the controls were jaggy on the Retina iPad. They might be doing some weird encoding of the video to prevent piracy and thus use a custom player designed to look the same.
Which is something Apple shouldn't have done - with all the crap they make devs go through, fully working airplay should be a required feature with all the video players.
I've actually done this before on my tablet. The speakers built in are pretty poor quality but my home speakers are nice, so I plugged in the headphone jack. I didn't want to bother moving the video from my tablet to my HTPC, but at least I got good sound.
I hope the big media companies get their acts together. They only get to screw up a finite number of times before someone comes and blows them out of the water