I'm sure many of you have heard Jim Jannard's recent boast (which might come true) of the Red Dragon upgrade beating 65mm film here:
http://www.reduser.net/forum/showthread.php?90520-RED-Dragon-vs-65mm-filmOther than the exceptional claim of 16 stops of DR and a 6K sensor (close to the D800 almost), the one obvious problem is the DOF characteristics - both 65mm and IMAX have larger film sizes. IMAX is 70x48.5 while the Epic Dragon is larger than Super 35 but smaller than full frame: 30.7 × 15.8 mm
If the sensor technology permits 30+ Megapixels in Super 35, then why not 4K 24p on a medium format sensor?