iTunes 9
Genre Browser
OK, so they moved the genre browser to the left. Luckily you can change it back to top with View > Column Browser > Top.
UI
The new interface is very white. All the progress bars look better than before, but I can't get over just how bright it is. The Movies section still won't do folders or anything, but I suppose that's what search is for.
Store
The new store is easier to navigate and it's much easier to preview songs. It's actually a lot like the iPhone iTunes store.
LP and Extras
I have been saying for a long time that there needs to be a file format that allows menus like a dvd with all the extra features, but still contained in one file. Finally, Apple has delivered this.
It will be interesting to look inside these files to see if something like Handbrake could ever be used to generate them from existing DVDs (the holy grail) and if open source players could ever support anything like this. This is the most exciting thing to me as now I can actually think about buying movies in iTunes. Why pay the same price as DVD and not get any special features?
A better description of the special features when browsing the store would be nice, but hey they're just getting started.
Final words
Finally someone chose to try to solve the problem of include special features with movies - all in one file.
Iron Man is for sale this way. I might have to try it out.