From David Pogue’s XO review:
Most of the XO’s programs are shareable on the mesh network, which is another ingenious twist. Any time you’re word processing, making music, taking pictures, playing games or reading an e-book, you can click a Share button. Your document shows up next to your icon on the mesh-network map, so that other people can see what you’re doing, or work with you. Teachers can supervise your writing, buddies can collaborate on a document, friends can play you in Connect 4, or someone across the room can add a melody to your drum beat in the music program. You’ve never seen anything like it.
Look’s like my idea of a pervasive Ether in 20H may become reality after all!