The addition of Potter to Universal Studios Hollywood will undoubtedly increase attendance considerably on the West Coast, too. Though I'm still in doubt as to whether Universal will be able to dig into Disneyland's attendance quite as much as they have with Walt Disney World.
Potter Land in Universal Studios Japan will be incredibly interesting. Just how much will it vary from the Orlando version? Will the Japanese market expect something different?
And, most importantly for the money men in the Far East, how appealing will Harry Potter merchandise be over at Universal Studios Japan.
If I'm reading that correctly, and my math is correct, islands of adventure saw (at least) a rise in attendance of 1,756,000 people for 2011.