You've seen them. They're cool. I think it's a question of when they come to WDW, not if. What kind of effects would like to see at WDW?
-Since there's no night parade at Disneyland or DCA, we won't see this until WDW at the earliest: I think these would be really great with a night parade. Each float would have its own effect. Imagine watching the parade from the train station and watching the streaks of color follow the parade floats down MSUSA. It would make the crowd part of the show.
-Laugh Floor. When there's laughing or screaming and the lights react like they do now, it would be really neat if the ear hats "played along". Something like that would actually enhance the story of the show. Since you're in a show, I don't think it would be a distraction at all. It would be different if you were in a dark ride and saw somebody else's ride vehicle lighting up.
Your thoughts?