It seems that some people in this thread are looking at the wrong camera. This camera is designed mainly for still photography, NOT video.
Video is just a small "side bonus" on the 5D3, so don't be so surprised if Canon doesn't give you the features you want. They are saving all the good stuff for the 1DC-line. That is where you should be looking.
For video when compared to the D800, it lacks several major / almost crucial features.Same as with the still photography features.
Alas, it is a shame that most of the missing features can't be added by firmware. Like more resolution, more DR, and spot metering linked to selected AF point. (Just to name a few).
Spot metering linked to selected AF point can be done, I think. Evaluative metering is linked to selected AF point.
Also, regarding of DR I remember now Nikon D80. In its initial release there were an awful noise at high ISOs. But later they corrected that through firmware.
Ok, I don't think that they can do wonders, but I know that they can tweak the DiGIC registers in order to obtain better Dynamic Range:
The surprise comes from a little ISO test, which shows that ML can
improve dynamic range and highlight rolloff in movie mode (see
attached files). How much? Let's find the answer together by running a
The above quote is snipped from https://groups.google.com/forum/?fromgroups#!topic/ml-devel/PK1SX33ewRg
Before putting my wishlist, I think that's quite important to understand that we must give as much feedback as possible
(in quantity and
quality) in order to make from 5DMk3 the best camera around. And I know that this is possible because the best camera is the one which will allow us to take the best shots not the one which looks best on paper.
Look at PC / Win vs Mac. Wins the one which helps you better to get your job done.
I can easily prove that "Linux is better" (no flamewars please - thank you). But how many of us have Linux on our computer?We need to make from 5DMk3 the tool which fits our needs
. And for this we must communicate our needs firstly not mainly our solutions. Think outside the box. Sometimes helps.