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 i

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.