Yeah, I know there would be drawbacks, and most people would use bitmaps. But, I could see some situations where it would be the better choice.
Obviously you'd have to choose between certain functionality ... as with any other use of vector v bitmap. Bitmaps have drawbacks too... more detail does mean more resource usage... If C2 had the ability to actually generate the vector graphics within the game it would mean, if you did things right, a super small download in comparison?
I wouldn't expect it to be a priority. But I think it could be particularly powerful as an added bonus.