I was once at a Bose dem at a hifi show in Manchester when the little 5.1 system was demmed. As one poster has mentioned the small satellite speakers were shrouded, only after the dem did they reveil the tiny speakers, the sub etc. The dem was very, very impressive (around 14 years ago). They did however use a massive cinema screen, not a tv. The film/soundtrack was a custome Bose demo thing, so the sound could have been optimised.
This (as was pointed out to me some years later) a bit of a psychoacoustic trick. The bigger the screen the better the sound. Any one with a big telly and a big sound system, try watching the same film on a tiny portable but the same sound system.....doesn't sound the same......don't believe me......try it.....(films not stereo audio though).
This applies to cinema sound which I think is generally appalling but can sound impressive with the big screen, but listen with your eyes closed........