I am a purist, especially for the best anime ever (I said that just for you, Alucard ). Unfortunately, purists never seem to get what they want.
Books are a completely different matter. Books can tell what's going on, but they can't show it exactly, so movies can translate them in whatever way works best for them. Bebop and other anime show what's going on exactly as it is, and in a way that live-action can't show exactly.
I know it will be made, or get stuck in Development Hell, which I would prefer. If it does get made, I will probably watch the movie once just because I have to see what they've done with it, and maybe even buy the DVD to remind myself and anyone else why Hollywood shouldn't make films of great anime like that. But you are definitely right that it doesn't affect the original work, and I will always have the whole series and movie of the best anime ever, so I'm happy with that.