The author of the article I linked to did have a disclaimer that he didn't really have a viable alternative to propose. But rather, his point was to inspire us to think about something grander, rather than settling on a transitional technology.
If he is able to reach out to a few creative, motivated individuals, we could see the evolution of technology take a leap, sparing us all from the stagnation of picture under glass, which as he points out is where all the current 'visionaries' are depicting. There are a few Corning videos showing the same thing. But of course they'd push glass
Speaking of 'glass,' the google glasses would be one such leap in interaction... And it focuses on the eyes rather than the hands. That's real innovation.