It's a serious science, not a mass marketable concept. The home theater combines both audio and visual to bring a more powerful communication to the listener, and hence clearer image. We have all wondered at one point in time or another how the speaker in our TV sets sounds so good when we know its just a cheap speaker. The answer is simple. The visual image received by the eyes and the sound heard by the ears are both interpreted simultaneously by the mind and are both used to create an image or feeling in the consciousness.
Vision is a very strong cue.
Anytime your eyes can see what is making the sound, the sound will become more clear. This makes it easy to interpret quality that is actually not there, and perhaps the reason so many people are drawn to home theater. In a home, the act of placing a TV between your loudspeakers or placing your speakers against the wall is the ultimate hi-fi sin. It makes it absolutely impossible to create a 3D sound stage. On the flip side, I have played high quality soundtracks in stereo on a projection screen in my treated listening room and found that sound quality to exceed the video quality by so far, that it was extremely distracting.