At yesterday's Google financial report meeting, someone raised a question to Google CEO Larry Page about Google Glasses' operating system. Larry Page's answer was simple and clear: "Obviously, Glass runs Android. Android has done very well in cross device, and I think it will be better in the future."
This is obviously good news for developers. They can use the same language as Android App when developing applications for Google Glasses, and it will be easier to transplant the current Android phone applications to Google Glasses.