That's completely different...
the iPod keyboard is little and the typing speed expectations are smaller. a full size keyboard that disappears when you put your fingers down on it, that is fullsize so most would expect to rest their fingers on can't be used as easily as a real keyboard. Also, this thing has been out for years and never caught on and the reviews aren't favorable for it, other than the gimmick appeal.
So: this keyboard and the iPhone keyboard are completely different.