The problem with this system is that it seems to require 10 usable fingers, which excludes a non-trivial number of people. Or, as my best friend (who only has the equivalent of two fingers - but less flexible - and who has to mouse using his feet) puts it, "The future of interfaces seems designed to screw me over."
I've tried the multitouch-is-a-keyboard thing with a fingerworks device, and while it's great for graphical/point-and-click things, the typing speed penalty you pay for not having physically distinct keys is huge. Definitely not worth it unless you just don't type very much.
The problem with this system is that it seems to require 10 usable fingers, which excludes a non-trivial number of people. Or, as my best friend (who only has the equivalent of two fingers - but less flexible - and who has to mouse using his feet) puts it, "The future of interfaces seems designed to screw me over."