If Obsidian makes an option to output the combat log to a file, that would qualify as a dual monitor support in my eyes.

 

We could then close the ingame combat log window, open a log viewer maximized on the second monitor and read the combat info from there. Currently, the ingame log window, while nice looking, obscures a considerable portion of my game screen.

 

Depending on how the combat log is implemented in the game, introducing such an option can even turn out to be easy.

That.. Would actually be really neat. I never thought about it, but I have two monitors, and I can see myself using such a setup. I wouldn't want it, if it takes away any significant time from development thou.