Dustin Curtis on Google Glass:
When I see the Google Glass UI sitting in the upper right hand corner of my vision, I think of it as potentially being one of the greatest tools man has ever come up with. It’s the true bicycle for our minds. It’ll make everyone smarter, faster, and better connected. It takes away the clunky interface of the computer, and it brings the world’s information directly to your mind.
Sure. Computers are a bicycle for the mind, it’s a great metaphor for computers, from the 80’s to today. Computers still require too much of people. Recall learning how to ride a bike, recall the effort of pedaling up hills, recall being all sweaty despite getting to work, recall maintenance and recall so many particulars of riding on a bike. Right, it’s a metaphor, but the extension is suitable, because computers have their learning curve too.
The difference between Wikipedia twenty seconds away in your pocket and the answer to your question instantly and unobtrusively in your vision is enormous.
Bicycles, and by metaphorical extension, computers, require some intervention to get information out of them (through a browser, through an app or just through some document sitting on the desktop), it all requires you. It requires an non-zero expendable effort.
Google Glass is all about instantaneous information. It’s cutting into the effort curve so steeply that it’s basically zero. It’s not a mode of transport where you expend energy to get there anymore, it’s not a bicycle. It’s a teleporter.