"iOS's 'fragmentation' between ios6 and 7 is totally different than androids because its temporary."
Says who? This change is much more major and, despite what Gruber and Marco would like to have you believe, is not design perfection personified, and is likely to be polarizing.
Let's forget about the z-axis and new interface updates, there are some major new features in iOS 7 that I'm sure a lot of people will want to upgrade to within the first month. (I predict faster adoption for 4/4s/5 users than we saw in iOS 6)
In decreasing order of importance (my opinion)
o Pre-Launch background Updating (Finally!) - I spend 3-5 minutes, every morning, and another 3-5 minutes, every night, downloading my Podcasts before my walk home. Annoying. Now, in theory - they'll download for me in the morning and night. Awesome - particularly as my iPhone 5 is happily sitting in an elevation dock at 100% power for most of the day, or plugged in at home for most of the night. It Will be interesting to see what developers do with notification launched background apps - hopefully it won't be abused.
o Airdrop for iPhone (Finally! How many times have I wanted to get a file/image/content off my iPhone onto my Laptop just before a plane took off)
o Swipe Control Center - another "Finally" - getting closer to android parity/rooted iPhone parity - I tweak the brightness/lock rotation/pause/play music and settings pretty often. This will length the lifespan of my home button (double click + swipe left to currently get lock + music settings)
o Enhanced Camera/photo management - looks really nice - lot of people will like this - even the die-hard Camera+/Instagram/Flickr/Google+ photo types. I do feel kind of bad for Camera Noir - their window was pretty meager. :-(
o iTunes radio - particularly for all of us who already subscribe to iTunes Match.
o Advanced Siri - I use Siri many times a day, looking forward to this.
Says who? This change is much more major and, despite what Gruber and Marco would like to have you believe, is not design perfection personified, and is likely to be polarizing.