Ubuntu design team member, John Lea, has revealed the official wallpaper of Ubuntu 13.04 Raring Ringtail. This is the new wallpaper.
And this is what she said:
We have got the 13.04 wallpaper ready ahead of schedule, so we might as well get it in the distro now ;-)
Download Ubuntu 13.04 wallpaper
I think it looks like Ubuntu's 12.10 wallpaper turned upside down! What do you think?