I'm working with Zbrush and Maya and therefore I use disp maps to transfer the model from zbrush to maya without bringing >1 million polygons to maya.

I don't have anything with game engines to do. So, therefore I think I do not need realtime rendering.

Actually, what I do mostly is creating small aniamtions, still-pics, and adding some special effects to self-captured videos. (all non-professional)

Am I right, if I say that I actually don't need normal maps for my stuff and disp maps are better for me, since rendertime is not really a problem for me?