No good. Then the receiver would always have to be on to watch tv. Besides, if Im watching tv via the hdmi input, I cant select audio from a different input on the tv.
90% of the time the family watches regular live tv with the tv speakers.(hdmi to tv). They have no interest in listening to it through the receiver. (heresy, I know!)
When I sit down to watch tv, a movie or listen to music through WMC, I want to just turn on the receiver and hit mute on the tv. (without having to exit out of WMC to change the audio output.
Other people have different needs for the same thing... Seperate audio on different outputs simultaneously, or sending audio to a different zone from the pc.. Etc. you may not have or understand the need, but it does exist. That was one of the few things I loved about the ps3. I used it all the time like that. When your use to something, it sucks when you cant do it anymore.