A customizable combination of 2 hot keys. Holding them down for a moment will make the icon seeker automatically appear directly underneath the cursor. Then the user can just simply scroll to the program he likes. But of course the scrolling requires the hot keys still held down. Releasing the hot keys will hide the docklet again.
I think this will be quite useful for those who multi-task speedily. It might be similar to "make dock appear on top" feature, but then this suggestion makes the dock appear directly under the mouse and also will autohide when the combinations are unpressed. It's more practical.