Design is always a trend. In 2007, skeuomorphism was really cool, and I think Apple did it great. Now, after 6 versions of iOS, consumers are now asking for the latest trend which is flat and thin text, and Apple has responded with iOS 7. It's still rough around the edges, but they'll surely refine it in the next few betas and I think they'll nail it in iOS 8.
However, people by nature are resistant to change especially with aesthetics. A company like Ford had so many struggles with the Mustang in the '80s and '90s when they changed the way it looked, and when they brought back the old look in 2005, everyone loved it. For the Apple fans like us, it seems like Apple made a big change with the looks. However, because the grid layout of the homescreen, and because the core functionality of the OS are still the same, I believe the majority of consumers won't notice the new design that much. I've shown iOS 7 to a few of my non-geek family and friends who use iPhones and iPads, and they were like "what's changed?" Apple managed to balance the new UI that it doesn't put off people like Windows 8 did.
I think there could be a few heavy skeuomorephic apps for those hard-core Apple fans that miss the old design and want some blast from the past, but it won't be a mass market that the majority of people buy into. It'll be a niche. I could see a 'classic' notes app coming back, or a bookreader app with real turn pages.