Apple's budding love affair with a particular linen texture.
Note: Do people really want skeuomorphic linen ubiquity?
These transient scroll thumbs appear on top of the window's content, not in alleys reserved for them on the edges of the window.
Note: Hint of a move toward head-up display?
Perhaps just seeing a screen covered with a grid of icons unconsciously triggers the "iOS expectations" region of our brains.
Note: This notion of triggers and expectations interests me a lot, as faving gestures have now come to mean, for me, content shifting.
Scroll bars do more than just let us scroll.
Note: Scroll as quantitative cue.