I agree with Mr. Ashton (as I almost always do)... This is a technology in search of an application. No one's going to spend time re-learning a process we know too well. It could be used on toddlers to teach the next generation, but there's no compelling reason--or market--for either improved muscle health or productivity.
The current QWERTY configuration is "good enough." And, if you are a proficient typer, far more productive than usable speech-to-text apps such as Dragon.
It ain't broke. Don't fix it.
WASD switch to ZQSD (for AZERTY keyboards) is already badly supported in about half of the online (flash) games.
We would first require all applications to offer flexible keyboard settings before even thinking of such a radical change in keyboard layout.
ie: first ask software developers to support all existing keyboard layouts before introducing even more of them.
Yeah they're definitely not going away, but with more and more mobile usage into the future there's a huge opportunity for somebody to do original thinking 'outside the box'. This keyboard doesn't appear to be it.
We might use fewer keyboards, but they're not going away. I wouldn't even say that they'll be "rare." They just work much better for tasks such as writing or data input than touch screens or voice recognition.
Isn't technology racing toward "keyboard-free" computers, i.e. "touch-screens"? The public probably won't even know what a computer is in the future; they will be just known as digital assistants, or something like that.
Remember the scene in Star Trek where Scotty picks up a computer mouse and talks to it. Why would anyone in the future want to use a keyboard?