Was just talking about this with someone and remembered I'd seen it on a Miller Lite commercial a couple of years ago. You may remember it as the dancing lights set to "Wizards in Winter" by Trans-Siberian Orchestra. I found it on - where else - YouTube, otherwise known as the Black Hole of Spare Time.
Check it out, complete with a detailed explanation of the background behind the display.
Gives me some ideas for my own Christmas light decorating ... none of which I'll do, but ideas nonetheless.
Oh, and for anyone who doesn't share in the whole "Christmas spirit" thing, there's one of my new favorite blogs, Tacky Christmas Yards. My favorite is titled "Hunting Season."