[citation][nom]tokencode[/nom]Vuzix is doing these the right way... Google's prototype looks annoying to look at and it's only 1 eye. Vuzix is a dual display that look like wrap-around sunglasses with a transparent screen. This would allow for a true heads-up display scenario for both eyes, allowing 3d. This could allow objects to look like they are actually in the same room as you, not just layered on top of it.[/citation]
Yes, because what we all want are HUDs on both eyes obstructing our LOS with texts and graphs. For fighter pilots, that isn't a big deal in skies that aren't filled with traffic to begin with. WIth helicopter pilots, they have a HUD on only one eye (last I checked anyways). So to have a HUD on both eyes, that's a problem. If you look at Google's design, its not directly in front of your eye, allowing you to look up briefly to see what notification you need.
Google's approach is more intuitive and natural. It will also prevent you from trying to pay attention to the screen when there is something ahead of you to worry about (ie a car in traffic). What Google seems to want to do with this is create a simple widget/notification display and a camera with which to share video with.