Caveat: I agree that not ALL Disney patents are designed with no specific end-use in mind. In some cases, they need to invent something on the fly. By doing so, they have automatically proven that their invention "fulfills a specific need", so the legal team follows alongside the design team, documents everything and heads off to the patent office. Meanwhile WDI implements it into a ride system.
However, this doesn't happen very often, or at least not near as often as the Mad Scientists are spewing out legitimate, but yet un-assigned, inventions. Disney owns piles of patents that have not been utilized anywhere, and probably some that have been used elsewhere, or years after they were patented.
My point is simple.....if you hear about a patent, and you also hear about a possible new ride/show/attraction, it is not necessarily a fact that the two are affiliated. Using this philosophy allows me to say "I told you so" far more often than those who jump on these assumptions