I love the page turn animation in iBooks. I love the shredding animation in Passbook app. I love the page curl in Maps. I love the shiny buttons. Skeuomorphism is fun. Everything I love about iPhone is going away.
The idea that skeuomorphism won't stand the test of time is absurd. Things on the screen have to look like something. Things that are hard to imagine as a physical entity are hard to relate to and are hard to figure out. It can look like something from the past (reel to reel in the old Podcasts app), something from the future (Time Machine on OS X) or even something imaginary. The alternative to physical is abstract. It is hard for ordinary everyday people to figure out abstract interfaces.
This is the beginning of the decline of Apple. The question of can Apple still be Apple without Steve Jobs has been answered. And the answer, sadly, is a resounding No.
The parallax feature of iOS 7 is cool. And so is the rain and snow in the weather app that looks like real rain and snow. But this is realism. They removed the old realism such as leather and torn pages and then added it back in spades in the weather app. No restraint whatsoever. Apple designers have lost their way without Steve Jobs.
It is skeuomorphism that made the iPhone a darling of consumers around the world. Skeuomorphism frees technology from the shackles of inscrutable "computer interfaces" and makes it accessible to ordinary everyday users.
The iPad calendar for example, is something that you can show to people who have never seen an iPad before, and they don't see a computer interface. They see a calendar. The instant recognition triggered by skeuomorphism causes the interface to disappear.
The human brain likes both the comfort/pleasure of tactile feedback and the predictability of behaviors implied by familiar appearances (affordance and metaphor). Steve Jobs leveraged these brain responses to the approval of Apple's customers. Steve Jobs understood more than anyone else how to make technology accessible to ordinary everyday users.
This is very well said and I respect your points. In the spirit of open discussion, allow me to make the counter-point...
Professional graphic designer here (I can prove it, if anyone feels the need for me to). Personally, I think iOS 7 is a huge step in the right direction. There's not anything objectively "right" or "wrong" about skeuomorphism, it's just a matter of taste. However, there's a sector of the design community (myself included) that believes in honesty in design.
One of Dieter Rams principles of good design is "Good design is honest." This means that the design doesn't claim or appear to be something that it isn't. The Calendar app in OSX Mountain Lion, for example, is not a leather-stitched calendar with ripped out pages. It's just pixels. We all know that. By making it look like a physical object that it isn't, it's inherently disingenuous.
Originally skeuomorphism was used to indicate functions. People weren't familiar with a digital calendar, so it was made to look like its real-world analog so it would be instantly understandable. This is still illustrated in even the everyday vernacular of a computer environment. Like calling the "desktop" a desktop. It's not actually a desktop, of course.
The problem is, when you design something to look like its real-world analog, you limit yourself largely to the functions of that real-world analog. In iOS 6, look at Contacts on the iPad or the Reminders app. They're stuck looking like an address book and a notepad to the point that any features beyond what a physical address book or notepad can do becomes extremely difficult to implement in a natural way. By fully committing to skeuomorphism, you limit the innovation and features possible in the app.
For example, what if the compass app still looked like a physical compass? It'd be pretty hard to put the inclinometer in it like in iOS 7. Compasses don't have those, normally, yet it's not worth having its own app just for that. You can see the conundrum.
Also, when you commit to skeuomorphism as en entire design philosophy, it invites laziness. Find my Friends is the most egregious example of this with it's faux leather and stitching. What is the real-world analog that Find my Friends is referencing? If anyone can legitimately answer that question, you deserve a job at Apple. The truth is, it's not designed after anything in the real world. It's a purely digital creation. So, if it's not helping the user understand the purpose of the app, why does it look like that? No one really knows except Forstall, but I would argue it's out of laziness. "Oh we have this new app. What should it look like? Let's just do the leather and stitching again."
"Flat" (as people are calling it) is simpler. Not necessarily easier, but simpler. Simple isn't easy. Simple requires constant refining and paring down of the unnecessary and the clutter. iOS 7 is the groundwork for innovation in the future. iOS 6 felt like it was reaching the upper limits of what could be done with the previous UI design and rules. With iOS 7, it's just the beginning.
This is all, of course, just my opinion and any of you are invited to disagree with it.