The "natural" scroll feature in Lion is kind of pointless with current hardware. If it's supposed to be approximating the experience of dragging and scrolling on an iPhone or iPad, then there's one major problem: the current trackpad surface isn't mapped to the screen. If I touch in the bottom left corner of my trackpad, my cursor doesn't move to the bottom left of my screen. If points on the trackpad related to points on the screen, then it would start to feel more like I'm interacting directly with the computer. Right now, there's a disconnect. If I'm not explaining well, think of a wacom tablet: the tablet is mapped to your screen, so you can very quickly and precisely point, click and drag with your pen (Unless the tablet is set to mouse mode). Navigation via a mapped touch surface would be so much more efficient and more natural, do you think?