This is a great campaign by Google to find people who will evangelize the Google Glass product.  It’s basically a huge marketing campaign considering the fact that people still have to pay to get a Google Glass ($1500 according to the site – not really an insignificant amount of money to anyone) and you have to attend a special session in NY, SF or LA.  But still, a great way to build buzz around a product that hasn’t launched, find people on social media who will evangelize for you and get people to brainstorm and tell you what they want your product to do.  As for my idea:

#IfIHadGlass I would make a MMORPG that let’s you go on a quest with people from around the world by walking down the street (or you can play while sitting on the couch – your choice).  Players who are actually moving will get extra bonuses to encourage physical activity while playing.  Using Glass to add a virtual world on top of the real world would allow for virtual items as well as allowing users to alter their appearance (at least how others would perceive you).