This is what you get when you give the developers of a music game a very large CG budget and let them go to town. Is the punk kid riding a giant record needle? Does the trucker symbolize death? Why is everyone dancing while the overpasses crumble to dust behind them? Perhaps it's a parallel to Nero fiddling while Rome burned?
I guess it isn't something we should ponder too deeply. Now that we've seen it, we can just hit start as soon as it tries to play anyway.