Oddly enough, the thing that's disappointed me the most about Glass so far is that there's no real SDK for it that I can find. There's something called "Glassware" that lets you build views in HTML and throw them up on the screen, but that's it.
Am I just missing something? I suppose Google could be mirroring what Apple did with the first iPhone and letting the tech stack settle down before opening things up to third-party development.
(C'mon, who doesn't want to make a game where you turn your head to aim and say "pew pew pew" to fire?)