(You go out to the Ebay store? Can you tell me where that is?)
My point was, just because something isn't for sale in stores right now doesn't mean it never existed. As far as I know, Steve Mann's EyeTap glasses have never been for sale in stores, but kaolinite's argument was just silly – hence my comment.
If you don't like the 'reel-to-reel tape recorder' example, imagine I said 'enriched plutonium'.
My point wasn't that it didn't exist because it wasn't in stores but more that taking a device like that to mass-market is a much bigger challenge that making it for one person (not that I am saying his work isn't incredible).
When discussing UX and how this will affect the general population, this technology is basically brand new.
