BuddhaMaster said:

That's another ignorance here.

You can't also really say the color-grading is not final. Because movies are not a production that works in incremental steps, as the color-grading will be upgraded to the final look and become better. The initial look is right there. The only thing changing will be minimal cleanup in various elements. Not the general look.

The same argument is made about cgi effects. They do not upgrade them as if it's some kind of a software. The final composition of a movie or scene should be there right from the beginning.

That's a bunch of arrant nonsense ^. Wrong in every respect.

Watch this video comparing what you would describe as the "Final" colours and "Final" FX in the Hobbit trailer, to the "Actual final" colours and FX...

https://www.youtube.com/watch?v=qi94JM3zkxk

Also, as anybody who has ever watched a Deleted Scene before will tell you, the colour grading can be vastly different.