I don't know, it may be pretty to look at, but what's changed in the functionality? Have we fixed any of the problems with importing music where Zune thinks that two separate files are actually the same file? I still see a lot of "rebuild your Zune collection" problem posts so am hoping this is fixed.
I'd like to know what's actually changed and am hoping this is a step forward and not just eye candy. (Also hoping that any updates can apply to older Zunes as much as is possible, but that may be wishful thinking....)