Join Date: Sep 2010
Location: In the shadows ...
The Geller Field is a nice, vague, way for the Imperium to explain how exactly it can travel the Warp.
Oddly enough for all the technology lost in the 41st Millennium, of all the technology considered archaic and half-understood. The Geller Fields really seem to be one of the things the Imperium hasn't forgotten too much about. I'm sure some things are ritualized but Humanity certainly has clung to that piece with some single-mindedness.
The chaos gods abandoned Horus most likely because they saw the can of whoop ass coming their way and wanted out of the way so as not to get fucked up!