Interesting. This is the same fix as appeared before release; I was hoping for something improved, as to me the extra grey space under the toolbar is as bad as if not worse than the leather look. Might try it if someone could remove that too.
My main issue with it is that we were -that close- to a unified GUI on OS X, after 10 years of trying - removing the scrollbars was a sort of coup de grace. And then Apple had to go and beat the dead horse that resulted, like they couldn't bear the consistency, even though it should be the ultimate goal.
iCal is the worst case scenario - an app now blatantly designed for Fullscreen mode, as in no way, shape or form does it fit in if onscreen with other windows, and it is an app that you most likely want open most of the time. Address Book has done a much better job with the metaphor look, but it was still undeniably unnecessary. In contrast, it flies in the face of Fullscreen apps, not even allowing width enough to fit contact details in some cases. In summary the new look would have made a nice new Dashboard widget, but as the app has always had a pretty ugly UI, I am more forgiving.
Clear it is much easier to deal with the desktop apps than their iOS equivalents though, and with the imperfect syncing at least with Exchange still rearing its ugly head, I would sooner lose the iOS one - generally when I need to know about appointments I am at a computer anyway, less so for an iDevice.
Adding to the mix we now have iCloud, and the early impression videos show a calendar that looks much improved over Lion iCal! Same style, but with the sidebar returned, the main other gripe with it in Lion, and maybe even resizable reminder text? Madness
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