I doubt the card and its implementation would be that difficult... and with larger images, faster shooting rates, greater bit depth (which can contribute to larger RAW files), and people just wanting larger cards for convenience, or people wanting solid state memory for shooting video ... I think CFast can do well... won't be an overnight thing though... and maybe not for consumer cameras which are shifting to SD... but for pro and prosumer, and possibly for video, I think the change would come...