AACW is using the AGE engine which can be used in all resolutions your video card can supports. This means that you can play with an undistorted view but there is more!
1. as your resolution climb, the game will show your more regions.
2. as your resolution climb, the main interface panel will enlarge itself.
The second point is notable, because as we are using 2D arts it means that we are using alternate arts and not just elongating (this would be ugly) the interface.
Case in point, here are some examples:
Minimum resolution allowed, 1024x768. The main panel shows at most 6 units.

1152x864 resolution, panel extended to 8 units. Same view but more regions shown. Top panels are bit more spaced.

1280x1024 resolution, 9 units shown:

1440x900 resolution, even more regions and units (I'm in windowed mode as I don't have a widescreen, but it works the same):

Massive 1600x1200 res:

'I'm a weirdos' 1333x777 windowed resolution:
