The terrestrial globe is connected with information from Google Earth and has a touch-screen-surface for zooming in. You can enable different overlays like weather for example or a news-overlay that shows armed confilcts as a heat-map. Whenever a conflict in the world arises, that spot would be marked orange, while ongoing conflicts with heavy losses are marked red.
Arguments: You could argue, that such a globe is unnecessary, because you can access Google Earth by computer. But the difference is for one thing that such a globe is always on, so you can always have a quick glance and get informed about news in the world. For another thing the globe is more easily operated. You can easily spin it and the touch-screen lets you zoom-in with your fingers.
Gucci sells glasses with projection-functionality.
Supporting the ipod this seems to become the gadget of the summer for the wealthy.
Through wireless connection with the Ipod, Videos, Photos and Books can be viewed floating in midair.
Most of the power comes from an integrated rechargeable battery. There is another pair of glasses planned which get a part of their power from solar cells.
Also a connection to your cellphone is possible. Incoming SMS-Messages and calls can be read or accepted by pressing a button on the glasses.
Update: There is already such a device: http://www.myvu.com/
But of course it's not wireless, because the ipod has no wireless functionality yet. Furthermore, there seems to be still some need of development, to improve the product, if you read the comments here: Myvu in Apple Store