Fullscreen mode like that of MacVim
MacVim has a fullscreen mode with a select few options that (amongst other things) lets the background fill up the entire screen yet the viewport be of a fixed size (lines and columns) and centered. Essentially it makes it look like this: http://www.hogbaysoftware.com/static/writeroom/mac_os_screen_thumb.jpg
So even if used on a widescreen display the 80~ columns are in the middle instead of at the left side if the screen.
If this could be added it would be much appreciated.