Re: Why wide screen?
your new wide screen monitor probably has a resolution that is 16:9, or something similar. If you try to use an aspect ratio that does not match that of your monitor, things will not look correctly.
For example, if you have a picture that you took with your digital camera that is in a 4:3 aspect ratio, and your monitor does not nativley support a 4:3 aspect ratio, but you have your resolution set to somthing that is a 4:3 ratio (1024x768), the ratio of the image and desktop resolution match, so the image will fill the non 4:3 screen and be distorted because of it.
LCDs always look best at the native resolution, so make sure that you have the latest drivers for both your video card, and your monitor installed, and make sure that your video card can support that high of a resolution (older integrated cards cannot support resoltions like 1440x900)
Once your resolution is correct, videos and other things that are in 4:3 ratio, when fullscreened, should have black borders on the sides, and should not fill the screen.