Please list some of these devices, and/or cite examples. Otherwise your argument is null and void. I can't recall any specific device before the original iPhone that was using multi touch. No one pinched to zoom, or double tapped to zoom until Apple came along. It's only so commonplace now because everyone else is ripping on Apples idea. BlackBerry, Palm OS, and Windows Mobile were the smartphones of yesteryear, and none of them had any multi touch.
As in my previous post: <sigh>
http://en.wikipedia.org/wiki/Multi-touch
One of the early implementations of mutual capacitance touchscreen technology was developed at CERN in 1977[4][5] based on their capacitance touch screens developed in 1972 by Danish electronics engineer Bent Stumpe. This technology was used to develop a new type of human machine interface (HMI) for the control room of the Super Proton Synchrotron particle accelerator.
Multi-touch technology began in 1982, when the University of Toronto's Input Research Group developed the first human-input multi-touch system. The system used a frosted-glass panel with a camera placed behind the glass. When a finger or several fingers pressed on the glass, the camera would detect the action as one or more black spots on an otherwise white background, allowing it to be registered as an input. Since the size of a dot was dependent on pressure (how hard the person was pressing on the glass), the system was somewhat pressure-sensitive as well.
Apple does an awesome job of putting things together in a cohesive whole. It was a smart move to go for the trademark but the technology wasn't groundbreaking. At the time using it in a phone-sized device was pretty impressive though.