I do agree Americans are too fat and too lazy. But I'm not American, I'm European. And, oh irony, it is in the European Disney park that they use the lazy option proposed by the OP, that of a moving sidewalk.
WDW will not build a moving sidewalk at DAK any time soon. My concern in all this is that my next trip to WDW will be with a special needs person. She can walk, but she has limited energy. It's a shame if it is expended having to walk to a bus, having to stand waiting for a bus, having to walk in the blistering heat to a bus. Those sort of things matter to her. Me, I'm fine. I'll run that distance, for fun. But not everybody has that option. What I want is not an automated sidewalk - it's not going to happen anyway - but a consideration in every design decision of as many special needs as can reasonably be taken into account. There are a lot of people in between fit and handicapped - the elderly, the pregnant, the very young, the sickly, those with physical limitations. They don't need ECV's. They need shaded waiting areas and short walking distances.
I would like to note that I never truly stated that I had a masters in planology I only asked if it would help the discussion.