Gabriel,
I think you´re just right about the highly compressed h.264 as a starting point - bad to my process. As far as I understood (and I´m an amateur on video) the less compressed, the better raw material to manipulate. My films do not deal with reality so my final images are close to painting rather than to film/real image. Even if I could only use a DVD format (I really hope not) player to show my work (my dream is a RED projector 4K device or other similar; no matter the brand) I think and trust that as you pointed a 3 or 4K almost uncompressed material, as a starting point, as my ink and canvas will allow me to end up with much better results.
My point isn´t screening film or transfer to 35 mm (hope so one day ,-) is to deal with the best possible starting material; less compressed, etc. Because now I see image degradation.
Thanks for your nice opinion ,-) Allways welcome your thoughts guys.
On the other hand I trust that FCP X will handle well 4K material (if from RED with some RED hardware help too, that allready exists) if Apple is programming for it. I still trust Apple guys.
I only see good stuff in the future. Hope to gather conditions to proceed with my work, with the best tools.