Hi pedalpete, BTW, the video is a spot and not meant to be accurate but highly communicative. We did that to make it wide opened to all sizes. We thought that

Hi pedalpete, BTW, the video is a spot and not meant to be accurate but highly communicative. We did that to make it wide opened to all sizes. We thought that the user was the one who should decide, therefore the opened distance. After using the mouse a couple of times, the user should adjust the finger to the best distance according to his/her size. Now a very big finger fit and a small one too. In the future you will be able to shrink the circle or enlarge it and tune it best. On the other hand there is a visible area factor that made us leave that amount of size avalable to see. For example, when you are selecting content, you need to know what is below, the same when you are just viewing the different elements below the cursor. A cursor in a point extension of your finger is a good solution but cannot work alone, its not enought to create a real solution. You need to execute, select, mark, etc. We could have stopped there like for example this project did http://www.youtube.com/watch?v=kkoFlDArYks http://www.youtube.com/watch?v=kkoFlDArYks. They found the offset but stopped there and didn't follow that great discovery, they kept on searching. We, on the other hand focused on that point, the the two regions that now are the mouse buttons allowed us to work on selection. Hope I answered your question. Cheers.