I don't think this design is actually for keyboards, keyboards are just the intermediary step to voice, which casual computer users might well use more than even a mouse, if it works.
I already hate the chimes and beeps and twiddles that echo around the office. The very last thing in the world I want is to have it filled with the previous sounds and "computer: open file january report"
And, personal preference aside, there is no way that I can speak the _commands_ as fast as I can type them. For long paragraphs of natural prose, voice recognition is okay; for specific things, not so much.
