I don't see myself ever replacing a real keyboard for this, at least not for long typing sessions (being tactile is the most appreciated aspect of a keyboard fo

I don't see myself ever replacing a real keyboard for this, at least not for long typing sessions (being tactile is the most appreciated aspect of a keyboard for me). But there is absolutely a huge demand out there for this. Not to mention that other applications for it may appear (other than just replacing traditional QWERTY keyboards). But in the end the question is the same: how good it is? Anyone got a video showing it working (other than just the concept)?