> Have an alternate reality game with digital objects people can place/write on. Only Glass users can see the teddy bear in the corner, and only google glass users can see the giant graffiti wall where people sign their name.
There's a small team at Google working on a game that uses the real world as its map, Ingress[0]. I haven't been able to get access to it yet (typical Google closed beta), but from what I've seen of the game it would fit right in with Glass.