DB said:It's a video-DSLR for former Rebel users who have acquired a few prime lenses and they want to study film in college, so will sell their $700-1000 crop body and buy the 6D instead.
Who's to say that Canon won't discontinue the 5D2 before end-2012 (the 6D will be available from October) and then all of those aspiring Indie-filmmakers will have no option, but to get a 6D. They care more about ISO and low light + 60fps than they do about DR or AFMA (never mind AI Servo), plus for video an SDXC card is perfectly adequate as long as it can write at 5MB or 10MB/sec.
Also if this sensor (like the T4i) has continuous AF in video and is compatible with the new STM lenses, it will be a huge incentive to get this body and not a used 5D2