I am most interested in KM and information science, and a book addict, and a crazy user interface designer. I have paid much attention to these things. :)

Then can you imagine interfaces that do the same exploitation of our brain's affinity to physics to do the same thing, but even better? One that also uses a sense of locality?

It's still not the same.

Heck, little black and white Palms were must-have devices for med students years ago or so because you could have a reference for the entire pharmacopia, and it fit into their pocket. Not the same and not as good doesn't matter if there is a time/place/weight tradeoff. So long as you can have enough interactivity, even a clinku interface with a tiny bit of screen real estate is good enough for reference.