Hasta La Motion!

Hi you all!
I’m experiencing Nuke lately for little compositing and color correction works, in the past I used Premiere and AE.

I’ve always found this "cineon" conversion, but I sincerely can’t understand what it is used for… I’ve read this is a format helpful for working with "film" native videos, so why I should use it for videos taken with DSLR (which comes in .avi format)??

And more, I’ve seen videos are more "cinema looking" after I convert them to cineon, but is it wrong to make this conversion for "improve" a color correction .avi/mpeg/mov destination files?

I confide in your experience, thanks in advance for answers!:)