The developers often say that they dont provide proper widescreen aspects because they consider them an unfair advantage. Heres just one example:
http://www.shacknews.com/extras/2006/090506_bf2142_2.xShack: Are you going to have widescreen support in 2142?
Kristoffer Bergqvist: Were not going to give widescreen users a higher [field of view], because that would be unfair for the other people without widescreen monitors, so the FOV will be the same.
Shack: But youll at least have native support for the aspect ratio?
Kristoffer Bergqvist: Yes.