I think it could easily rival the C100/300, although ProRes would be better for most people.
Plus I don't know if they can get 1920x1080 RAW, that might simply be too much for the buffer, I don't think everyone wants to shoot 2.35:1. Although the detail resolved is very good, they could do 1663x940 (which the buffer can handle) and simply scale it up to 1080 and I'm sure the detail would still be better than stock.