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.