Photoshop took some cues from Pixelmator on UI design?
Finally, after many apps have shown that darker interfaces are easier to work with (even some Adobe Apps had these) the change is coming to the flagship product. It took about 20 years for them to realize that, which is typical Adobe-slow, but apparently cheaper competition breating down their backs with new features (pixelmator 2.0 is really getting there, although it’s not there … yet) maybe they decided to improve everything they possibly can so they’ll stop using customers. Especially after those odd decisions that only the two last versions of their products can be upgraded to the most recent one – the rest having to buy it all over again.