That's why we should refuse to buy HD audio content until they allow a computer friendly solution.
Matt, define what that means to you: the ability to play the media on a PC, or the ability to rip the content to a PC? If it's the former, DVD-A has support from Creative Labs today, and Intel in the form of the new high-def audio spec coming this summer on new mainboards. Intervideo WinDVD will play back DVD-A on any sound card (downsampled to 48kHz - but not compressed AC3) and any unprotected DVD-A (they aren't all protected) at full resolution if a sound card supports those high resolutions.
If it's the latter, well, I'm not sure what to say about the practicality of what you're asking. MLP-compressed multichannel audio is already massive, it won't get any smaller losslessly, and there isn't any player I'm aware of that would know what to do with it anyway. If it were only an issue of DRM, the many unprotected DVD-A's should theoretically be floating around the 'net. But I sure don't see them.
If you really want to exercise your right to take a downsampled version along in the car or on your iPod, current DVD-A's can have their AC3 or DTS tracks ripped. In the future, they'll likely have pre-encoded AAC tracks right on the disc - though my guess is as good as anyone's on what sort of DRM may exist...presumably similar to iTunes where you can burn a copy for the car, whatever.
As far as I'm concerned, DVD-A has what it takes to be a viable media and my theory is that it will follow the same basic adoption cycle that DVD-Video did, only much slower - the perceived benefits over CD compared to VHS->DVD-aren't as obvious of course. In spite of that, rising adoption of DVD-V and DVD-A capable home theater (in a box) systems thanks to the hdtv craze is only driving interest in the format, and it's currently one of the few areas of positive growth in the record industry association.
Take care,
-Doug
(Listening to Metallica - "Wherever I May Roam" in 5.1 surround while giving MC10 a much needed break tonight)