It's possibly worth mentioning that the original moon shots were - in a sense - exercises in publicity. OK, that's putting it a bit crudely, but if you read Kennedy's speech announcing the goal of putting a man on the moon (http://www.space.com/11772-president-kennedy-historic-speech...) he emphasizes how impressive a feat this would be, and he frames the whole enterprise in terms of a battle with the Soviets for hearts and minds of mankind.

While I can't say that I'm personally very keen on the whole idea of Google Glass, and I don't know how genuinely innovative these "moon shots" are. But even if they are not particularly innovative at all, I don't think there's anything inherently dubious about Google engaging in publicity for their vision of what the future could be.