I'm going to open this can of worms one more time, hopefully to settle it in everyone's mind. It has been proposed that Supreme Commanders does offer a larger FOV when using widescreen, with the toolbar on the side. If this provided a larger FOV, then I might be inclined to consider this something like an .ini solution to get Hor+.
Below is what I was able to find out. Everything here is at "default" dolly. The the only changes are the res and the toolbar position. I have resized the pics (as needed) to make the character's avatar the same size and position. All of the screen elements don't line up, as the angle of the POV does change slightly.
Here is an overlay comparison of 4:3 and 16:10, with the toolbar on bottom. This is obviously Vert-
Here is an overlay comparison of two 4:3 screenshots, swapping the toolbar from the bottom to the right. This provides a much larger Vertical FOV, making this Vert+
Here is an overlay comparison of two 16:10 screenshots, swapping the toolbar from the bottom to the right. This provides a much larger Vertical FOV, making this Vert+
Here is an overlay comparison of a 4:3 shot with the toolbar on the bottom, and a 16:10 shots with the toolbar on the right. This was the proposed "solution" to getting a larger FOV in widescreen. This provides a slightly larger Vertical FOV, making this Vert+. It is obvious that the increase in FOV for this comparison is much smaller than simply moving the toolbar on a 4:3 screen.
The conclusion here is that it is the change of the toolbar location that is increaseing the Vertical FOV, not the shift from 4:3 and 16:10.