Google isn’t holding off when it to Glass, and why should they? That’s why the Mirror API has been released: it’s basically an online resource of comprehensive documentation, complete with example code for developers who want to add apps to the Glass interface. The only weird thing going on here is that the application programming interface is still in a limited developer preview, but still, that won’t stop devoted devs.
Oh, and what is a Glass service called? Google says you should call them “Glassware”. Not bad, actually.