Am I correct in thinking that "3D Touch" is the first thing that Apple has ever brought out that wasn't a part of Xerox PARC's "Office of the Future" back in the 70's?
No. To mention a few, Xerox had a verb-object interface (you selected 'Copy', selected what to copy and then where to copy it), not the object-verb one, didn't have the concept of dragging, didn't automatically repaint partially uncovered Windows, didn't have a laptop with a keyboard that's close to the screen so that you can use your palms to prevent it from falling from your lap, and didn't do a click wheel or a touch screen. Xerox also, AFAIK, didn't do a hockey-puck mouse or a phone that bends :-)
Okay, I should have said the first significant thing that advanced the state of the art. None of the things you mention, especially the snarky bs, are anywhere near as big, IMHO.
What makes you think so?