We have a few products in mind that would instantly add value. Think about your feet or objects and surfaces around you like a table. Why not use them? Why not blend technology into natural things that use more senses than just your eyes and a reduced form of haptics.
I feel the same way and have enough spare cash to back it. Twald's explanation makes some sense, but really I think this is the essential part: "That means that we can explore completely new user interfaces, ones that are perfectly designed for the person and their needs," because I translate it to mean, "We don't entirely know what'll end up happening."
I'm happy existing in that state of ambiguity, however, and for $100 it seems worthwhile to find out what the future might hold.