Give it time. This could easily be the future. The base concept is there. These cams use much bigger sensors and therefore are a HELL of a lot sharper than any consumer level cam out there. And with the interchangeable lenses you can do things that average off-the-shelf camcorders couldn't even come close to competing with.
You won't find a still camera with 1394, especially when everything is going flash based. File transfer over firewire will go away IMO.
There is sound.
There is manual focusing while shooting (using Nikon glass - woot!)
You have video playback from the LCD
Yes it's probably not suitable for 90% of the pro video applications out there, however it is a sign of things to come and the convergence of still / video imagery.
For those in newspaper being asked to shoot video and stills this is really the hybrid of things to come. Audio is crap - but the workaround IMO is to work with something like a Zoom H2 and synch audio accordingly.
From someone who has worked in newspaper and having read the challenges my colleagues in the profession are having to deal with - this really is the beginning of technology actually making their jobs easier. Their content is being delivered to the web - this is a perfect solution.
With regards to firewire - it's a non-issue. With 32 and 64GB CF cards as the recording medium - slide one of these in to a CF reader via USB or firewire and go straight to editing.