The trackpad, instead of being a physical button, is a non-moving surface.
The click feel is done via what is called haptic feedback. Small motors vibrate in a certain way to simulate the feel of a click. Because the surface does not move, it can sense how hard you are pressing and translate that into commands.
It doesn't have much more than the old trackpad in terms of features, nor does it really "help" in any way either. It's just a trackpad. The force sensing can be used to determine say, how fast you want fast forward to go in a movie, which I believe is a feature that works in Quicktime.
Out of curiosity, why are you asking?