Hypertext links having weight [via Joho the Blog]. Links as vectors complete with magnitude. Your browsing has a direction and momentum that carves out a space. So if you always follow link-then-link then the subsequent link will be in the same direction. We need a topology that fits over the screen that affects your mouse cursor, so some links (in the same direction) are easier to move towards than others. (Example: Clicking a link is like propelling yourself in a certain direction with a certain velocity. This direction/velocity is determined by the link author and your own behaviour. On the target page, you retain your browsing momentum. Links in a different direction are harder to move towards. This is attained by putting a third dimension over the page which changes how easy it is to move your cursor. Perhaps.)