The reason it was removed was because it was extremely hard to set up and use properly. Glass is seen as a similar device as Chromecast in that it is supposed

The reason it was removed was because it was extremely hard to set up and use properly. Glass is seen as a similar device as Chromecast in that it is supposed to be completely plug and play where even the most basic users will be able to figure it out with minor instruction from a Guide. Since Hangouts was unable to work with this experience, it was not seen as adding value to the device.