Google search, Gmail, Chrome, and YouTube are all free to use, hence low barrier to adoption. Android devices cost money to buy, but the software is open source

Google search, Gmail, Chrome, and YouTube are all free to use, hence low barrier to adoption. Android devices cost money to buy, but the software is open source and free for OEMs. Glass, on the other hand, needs to sell buyers on a whole new product category. Also, as a very conspicuous accessory, it needs to make a strong positive fashion statement. Do I know that a floating expo is the best way to accomplish what Google's setting out to do? No, but I'm not convinced it isn't. As logicallee was saying, if speculation concerning nautical data centers hadn't percolated, nobody would be upset if/when that proves unfounded.