In that case, I'm all for it.
You don't really need a wide-screen layout for text, but the main benefit in mind is probably pictures. As of now, the limit for forum images is 599x700. Horizontal size is a huge limiting factor because that means even a rather small standard like 640x480 will still get resized. Vertical limit isn't usually an issue, but that can be too. The end result is if I want to even come close to posting a high-res picture, I have to upload and link it.
I remember the thread asking about people's monitor resolutions being at or above 1024x768. That's probably going to be the size of the new site layout. If so, we would be able to post standard 800x600 images, which I would love.