Earth's globe that has an interior projector for different map layers.

Have a globe of a semi-transparent material with a set of projectors inside. You can then bring up different map layers projected from the interior to be shown on the surface. This way you can use political, geological, topographical, transportation (roads/railways) historical (locations of ancient cities), environmental, or even have ocean currents animated on the surface. You'd still be able to spin the globe and have the image rotate as well as merge multiple map projections at once.

This would also make it cheaper to have very large globes as the interior hardware is mostly the same. Which would be cool to have a 1 meter globe for more detail.