This would simply be awesome. Imagine your battles spread out across your monitors. Any possibility of this being added in the future or even moddable?
definitely second this! Its a common setup now a days. I have my own dual-screens at home as well as at work.
if you have identical size monitors, and set the game to windowed mode, you can edit the prefs.ini file (as i recall) to launch a wide window that straddles multiple monitors, as a short-term hack.