Personally I'm keeping my expectations tempered...
1 Stop DR improvement (most likely in the shadows).
Corresponding 2/3 stop better shadow noise.
Purple Sun fix
My guess is there's going to be some intelligent noise reduction built in either on camera or in REDCINE... perhaps both. Maybe it'll target the blue channel... or copy info from parts of another channel to increase blue channel density.
These guys are starting to squeeze the sensor for what it's worth. The next question is when does the next sensor come out?