I am particularly doubtful for a number of pragmatic reasons and factors that have nothing directly to do with movies or music (e.g. things like economy, housing markets, the portability fad, etc.)
But, lets say for the sake of argument that the housing bubble refuses to burst and everybody moves out of their condos and apartments and into their own homes, that the economy solidifies and grows to the point where Joe Punchclock and Sally Housecoat can afford 5.1 systems that are easy to operate in their new homes, and that the current portability and personal customization fad goes the way of all other fads and Joe and Sally actually listen to most of their music in their theater room.