For what it's worth, there are better christmas displays than that one... for whatever reason, that's the one that became famous on the internet. If you look around, you can find some that are even better.
I'm still trying to convince my wife to let me do something similar. I've been gradually accumulating very large numbers of christmas lights. I've played with the software to control the lights. I've priced the necessary hardware. Fairly do-able. Now, I just have to convince the wife to let me pull the trigger. Not gonna be this year, but mayyyybe next year.