Which is irrelevant.
Jeezus. For a lawyer, you make a pretty good computer geek.
Patents, as a legal concept, are not about ideas. They are about specific implementation of an idea.
Yes, it's a functional process document.
The tablet in 2001 is clearly FUNCTIONALLY the same as the iPad, and by any interpretation of Apple's design document, exactly the same.
Remember, Apple's patent does NOT cover operational processes of the device, it covers the SIZE, SHAPE and APPEARANCE ONLY.
eg. thin rectangular device with a glass face. If you think the device envisioned in 1968 for this movie is not exactly this, then I'm sorry your fanboy blinders are impenetrable to even the most rational of thought.