Although this new patent by Apple may not make it into Leopard, it probably means we're going to get some new Dashboard features sometime in the near future. If you can remember back to last year's WWDC, where the multi-desktop "Spaces" feature was demoed, you won't be that surprised when you see where Apple's going with this.
The patent shows a cube with Dashboard widgets on each side, being shown as the cube rotates. The cube doesn't have to be a cube—it can be any 3D shape. This, combined with Spaces, should give the user a feeling of having much more room to maneuver than he actually has.
Other stuff revealed in the patent have to do with Dashboard organization and configuration, so you can take a look at that if you're a big fan of widgets. Or patent drawings.