Theoretically it means that the screen senses pressure in addition to location(s) (note that all capacitive screens do this already, where pressure is proxied by size of touch, which is useful with big meaty fingers but is arguably less precise. Android publishes this, since version 1.0, as "force"). The demos are a little odd, though, as all seem to be primarily about the difference between taps and long presses, being entirely defined by touch time rather than pressure.
Yup you're correct: named pressure rather than force (the specific function you linked was not in 1, but pressure was in the legacy methods since version 1. Search the page for pressure).
It is live on most devices, and reflects pressure quite accurately, and is doing it by measuring the touch area per contact on the screen, which with a human finger varies based upon the force of the press. Presumably on the Huawei they would just use the actual pressure sensor instead of the proxied size.
