Google's decision to rule out facial-recognition and voiceprint applications for Google Glass is causing aggravation for some developers in the medical field, for example, who say it limits the potential utility of the platform. "In the long run, this decision is going to hurt the Glass ecosystem. They are creating a walled garden that won't put people in a creative mindset exploring this space. They'll be thinking, 'Will Google approve my application?'" Lambda Labs' Stephen Balaban says.