Yes, this. When I first heard about OS X all those years ago, I dismissed the ideas as eye-candy until I actually played with it. I quickly noticed how much thought had been put into what was conveyed by all the little animations and finesse touches.
The same thing applies here, I think - I watched the video expecting to see the exact opposite of what I want in a UI, but came away impressed by how much thought and consideration has been put into it.
All that is very old-school Apple actually. Way way way more thought put beneath the surface than just meets the eye, when it comes to UI interactions.
I remember the inertial scrolling, rubber banding stuff on iOS. During those early days, people analyzed things like the navigation push and pop animations, and there was a lot more going on there than just "go left, go right"