I'm kind of undecided. Personally I prefer clean, clear layouts with as little visual clutter as possible, and it's one of the few things about Windows Metro (or Windows GUI or whatever it's called this week) that I actually liked, though half their apps failed to demonstrate any real attempt to stick to the basic idea.
Over the years OS X has gotten more and more consistent, clean, and unobtrusive, yet iTunes and Safari continued to use custom widgets that spat in the face of that, and then suddenly Calendar etc. went crazy and became even more different. I mean, does anyone else remember what it was like when we had a mixture of Aqua and brushed metal everywhere? It was horrible, as nearly everyone wanted one or the other, but not both side-by-side.
I can understand why touch devices might want gimmicky faux physical interfaces as cues on what can be touched, but for the desktop I don't see the need, as even desktop users with touch pads aren't actually connecting directly with the apps they're using, so these kinds of novelty designs serve no real purpose.
It's not that they aren't cute in a way, and there's a novelty to them, but I'd rather have practical, efficient and simple from Apple; leave novelty to the third parties.
It's almost like the arrival of Core Animation caused this little spark to ignite at Apple that said "Oh hey, now we can totally do all those things we were never supposed to do before!". I mean, tons of people hate animation in all forms; I don't mind so much so long as it's quick and tells you something about the interface (i.e - it's visual feedback rather than just eye-candy) but it does point to an inconsistent strategy that I think Apple needs to get a grip on.
On the other hand, these kind of friendly gimmicky interfaces can be great for people that are new to the platform, provided it isn't one of the cases where it's actually causing confusion, but seasoned users have no need for it, and the lack of consistency actually interferes with usability since every app ends up slightly different depending upon what it's physical analogue happens to be.