Perhaps it's true that many adults will remain unwilling or unable to learn a new keyboard. But should we continue to saddle our kids with antique systems? I think the best beginning market for many innovative devices is kids who play computer games. But it takes progressive parents to see that the long-term cost/benefit ratios of better computer interfacing are potentially a lot better than those for school classrooms.
Many people are also afraid that if they make too good a connection with the computer, it'll begin to control them, and they'll become part of it. Perhaps this is a possibility. I think it's a matter of who has the stronger will, the person or the computer (or the pro- grammar or the boss). I see it more as the computer becoming a part of me.
Many of us wear hats and clothing which are more symbols than functional, and jewelry which is by definition only decorative. Glasses are not considered attractive. What do we have against wearing something useful?
Of course for many who work in a rat race type office, this will merely be a new skill they have to learn, with the benefits going to the boss. Also, I'm somewhat concerned that some innovations help big computers and big businesses more than small ones, and the military establishment more than people. But my philosophy says that the good shall prevail, eventually. With more powerful tools, both good and evil will be enhanced. The non-viable, anti- life/love/truth entities and activities will destroy themselves about as fast as they develop. With luck, they won't destroy us at the same time. Those who are seduced by the rat-race become tools themselves, rather than people.