I think this is yet another sign of how things will begging in the camera business from now on. Until such a time when there is a full-featured, high quality cinema camera for under $4K, enthusiastic cinematographers will continue to attempt and make their own. The GH2 is a prime example of this, along with the NEX body kit as well s ReWo and other high quality cages and gear. This goes to show that many are still looking for much more than what is currently available from any camera out of the box. The first camera company to realize this and cater to it would be able to capture a large and loyal user base very quickly if they played their cards right.
The latest offerings are much closer but still leave something to be desired. The BMCC has a smaller than S35 sensor, as well as completely unnecessarily long FFD. The Sony FS700 does not yet shoot 4K, and does not deliver RAW, but is otherwise incredibly well-endowed. Canon is either using old sensor tech, or slaps on a $15K price tag. Also, rolling shutter is still an issue basically across the board.
If I were a betting man, I'd put my money on Sony coming up with the first truly great RAW camera. The FS cams are a perfect candidate, and the BMCC is almost certainly forcing many of the big players to seriously consider RAW offerings. They have all the trappings of a serious video camera (ND, XLR, etc.), as well as the incredibly short FFD NEX mount and a S35 sensor.
I have a sneaking suspicion that there is another race happening in the shadows, though . . . one between RAW cameras and compressed codecs that are very nearly just as good. Compressed codecs have the potential to be every bit as good as shooting RAW once sensor DR reaches a certain point, assuming the DP is careful and exposes correctly. It may take until after several good RAW cameras are on the market before folks start realizing that RAW is not a necessity.