Another issue CMOS cameras face is called "flash-banding" where a part of the frame (like the middle section) is partially over-exposed or very bright because the flash went off when that portion of the frame was being "exposed".
And just found this about CMOS versus Film:
The mechanical shutter on a film camera leads to 4 microseconds of skew. The RED One had 9µs which led to issues in certain situations. The Mysterium-X in the Scarlet and Epic will have 5µs so it will be very close to film.
