Also a fan of Civ5 and all turned based games. Another extra thought:

In Civ you will know that building such Monument will take X turns or making some other technology progress will consume Y science points. I was thinking that it would be cool to be able to track when and how long someone will be able to afford something. It would be extra cool if this could factor in stock options you received in a company or any other assets so that you can draw a projection of the 10 year finance based on current earning/churn.