The purpose of a patent is to protect one's intellectual property, probably just an idea in this case, that has yet to be proven as a viable, entertainment medium. Usually, the idea is far from being fully developed, tested and proven worthy as the basis for a new attraction. I heard somewhere that less than 5% of the ideas developed by WDI end up being fully developed. They probably patent more than just 5% of the ideas, just to cover their bases.
By the way, I happen to hold a U.S. Patent for a novel, tough polyamide-imide, which is a series of polymers that's tougher than steel. Problem is, they're what we call in the industry 'brick dust.' Very difficult and expensive to process, so pretty much worthless!