You know what happens when Google announces a new product. People freak out. People claim Google is changing the world. People praise its openness and "don't be evil" mantra and that the company is just SO good. And then you know what happens when that actual Google product comes out? No one cares. It doesn't change anything except add to the growing landfill of crappy products. In short, Google promises a lot but rarely delivers. Or as College Humor puts it in this video, Google is full of crap.
Sure Google Glasses sounds awesome. And so does self-driving cars. But those things aren't close to real yet. Hoverboards and Wolverine blades sound awesome too.