The explanation is that it doesn't matter what you said. Google cares more about who you are[1] than what you say you're going to do[2]. Nearly all of the responses were going to be some variation on the core functions of Glass anyway, so really they were fishing for cool people, not ideas.

[1]: quoth the word cloud: "social", "media", "marketing", etc. [2]: quoth the word cloud: "use", "share", "show", etc.