In a recent interview (as of yesterday, 19 February) for DellVlog, Mark Shuttleworth says Ubuntu will finally change the default theme from Human to a "light theme". Here is the entire interview:
A member of several Ubuntu collaboration teams, including Ubuntu-Artwork has recreated the ubiquitous Human Theme for the iPhone. He plans on updating it for a simultaneous release with Hardy Heron. I was able to catch up with the creator and ask him a few questions.