This has got to be one of the cooler things I have seen from any Disney park in some time; last great web experience was the work my friends at Yellow Shoes put together for the New Fantasyland expansion.
For a limited time this winter, you can enjoy a Christmas version of the Tokyo Disneyland Electrical Parade Dreamlights on your mobile device or desktop web browser. If you and your friends use multiple mobile phones, you can watch the parade move across all of the devices.
You can learn more about Sync! Illumination on their website and you experience it your self here.