Comment 13 for bug 938758

If the wacom drivers offered a little more (closer to the windows counterpart) functionality in terms of mapping, one could easily map the monitor to a subset of the tablet surface, allowing to push past the edge of the desktop. I'm fairly sure there is a way of editing some settings manually to allow this. But this is a bit of a hack, and I doubt anyone would consider it an elegant solution.

The launcher should work as long as the cursor can reach the edge of the screen, without requiring that it also be able to reach past it.

Since wacom provides the underlying technology for several tablet PCs and also because absolute positioning is the only sensible choice for a touch-interface, i think the priority in dealing with this issue ought to be be higher.