For the best view of the Earth you really need to go up into space - or install this theme onto your Pocket PC.
This skin adds a picture of the planet as the background image to your Today screen. It's a decent quality shot taken from above the United States, and if you look closely you can pick out details of the terrain.
Earth Theme also transforms some of the Windows Mobile OS elements such as the Start menu, navigation bars and menu backgrounds. Generally, the Earth-colored scheme works well, although some of the black text changes are quite unreadable.
This PDA theme is designed for VGA screens at 480x640, so only users with this kind of display on their device can really appreciate its beauty.
However, fans of Earth (and let's face it, that's most of us) will enjoy the view that this Pocket PC theme offers you.