Expand wallpaper for multiple desktops

I would love to see the default Ubuntu wallpaper expand over two/three/four desktops (or monitors).

I suggest that the wallpaper included default in Ubuntu should come in four versions - one for each desktop (or monitor). So if you don't have, or use, more than one desktop, your wallpaper will look as it does now - just fine using wallpaper #1. But if you use more than one desktop the wallpaper will expand and view different wallpapers on each desktop (as we know it from Compiz - see the screenshot).

I hope you understand the meaning of this idea, if not please post your questions below and PLEASE CAST A VOTE AT BRIANSTORM :-)

Example screenshot: (perhaps not the best example)