Probably the only clients and guests that notice any difference in lighting are those that have been to a few events with DJs. Kind of like doing an A/B between speakers. One might think their $300 speakers sound fine until they compare them with higher end speakers.
So, I think in some circles there are people that have been to a lot of events with expensive lighting. Lighting seems to make a difference to DJs in certain areas, you know thouse guys that use expensive moving heads! For others, lighting just gives the DJ more confidence that he's offering something more than music.
I like having a variety of fixtures, but I don't like setting up lots of lights if it doesn't increase my pay. My clients are almost always satisfied that I'm throwing in four flat par color changers.
From what I'm seeing in the boom box video, I'm not impressed.