The voice interface, which was the talk of Parks Associates Connections Conference, may offer an alternative to the clumsiness of trying to manipulate virtual objects with one’s hands. At that conference it was suggested researchers are moving beyond basic voice recognition to understand context and emotion (e.g. you say, “I’m leaving in a hurried tone” and your voice assistant says, “Don’t forget your jacket, as it is going to be cold later tonight”).

From the article "Smart Glass Technology – Bring People Together, Don’t Drive Them Apart" by Ken Pyle.