Jeremy
in memoriam 1991-2020
They did in a tasteful way. So far the changes don't seem majorly noticeable if you've used iOS 7.I'd imagine we'll see iTunes 12 released when Yosemite releases - might be why the icon's not been updated in the DP yet.
How have you found the visibility of the new UI? I've downloaded it from my dev account but not yet installed it in fear that it'll be too...bland and hard to read, like iOS 7 was to begin with.