from what ive read from some of the devs who played with the beta controller and how i understand the technology behind the trackpads to work, it should feel like you are moving something around with your thumbs. So the sensation of physical feedback will be there with the improved accuracy of a touchpad. I think that it uses fairly similar methods to production line technology for small parts feeding. Where a highly controlled vibration is induced into a surface to move small parts along the surface. And by controlling the waveform of the vibration you can change the speed and direction of the parts