There is a nightly laser light show in Victoria Harbor called the "Symphony Of Lights". I wouldn't rate it as a top world attraction, but If you happen to be in Hong Kong you might as well go see it.
A Symphony of Lights is a famous laser lights and music show in Hong Kong. It is presented by the Hong Kong Tourism Commission through organizing 44 skyscrapers and landmarks that lie on the sides of the Victoria Harbor. Through interactive lighting and music show, it shows the vibrancy and glamorous night view of the city. The local Tourism Commission initiated the project in 2004, and it was formally included in the "Guinness Book of World Records'' as the world largest lighting and music show on Nov. 21, 2005.
see a video:: https://www.youtube.com/watch?v=P7PjnrqJCQg