I don’t agree with all of it, but Stephen published a great review of Yosemite’s interface changes today.

At this point, I’m not sure referring to Yosemite’s UI as Aqua is even correct. If Aqua defines the structures and underlying philosophies that shape OS X, then it’s still present, despite the ever-growing number of changes from those original lickable buttons. However, if Aqua is just a collection of colorful buttons, windows with title bars and a predictable color scheme, it may have died the second Craig Federighi showed off Yosemite this summer.

Don’t miss the GIFs showing how transparency and vibrancy can cause readability issues on the desktop (not a problem for me, but I see why this may be an issue).