@Mathos
A friend of mine, her and her husband have had a cabinet TV for years. He would keep replacing the CRT ones a few times, but when they got an HDTV a few years ago, he took the cabinet to his shop and reworked it to fit their TV. I have to say, it's something that really adds more to the look of the room than just an LCD panel.
I think it could be a good market for TV manufacturers to go. All sorts of goodies can be fitted into that space as well.