I'm not saying this technology wouldn't be cool or awesome to use, I just don't see it benefitting the majority of humanity in the future.
What do you mean by "benefit"?
There's a lot of stuff which has very little benefit if you define benefit in certain ways.
With luck the trickle down (people becoming rich from creating these gadgets; concentrations of very smart people in California; etc) could be used not only to explore deep oceans but also to create smart innovative tech for developing world problems.
It'd be great if Google (for example) had a developing world think-tank.
Don't wear em if you know where you're going. I don't think anybody uses Google Maps to get to their own house or anything they're familiar with. I only watched the video without sound but my guess is the use case is to help you interact and get things done when you have no starting point or fishing for something unfamiliar.
Basically its just a HCI transformation from phone to glasses which I personally wouldn't use either. I'm still waiting for the contacts version ;)
That's more of a philosophical issue with the whole human civilization. In our journey to become independent of the nature we made ourselves dependent on the infrastructure. And companies like Google take it one step further.