Yes, this is the case sadly. B&O decided people don't listen to audio in stereo digitally any more, and you would only ever need digital stereo audio from the built in DVD player. Very strange decision IMO, but there you go.
In the meantime, you could always just run analogue audio from the actual HD DTV box straight into the BeoVision 7's audio inputs. This would almost justify the choice not to include stereo decoding digitally if it didn't also involve more cables to squeeze in through the back-panels.