- ability to personalize phone beyond arranging icons
(its called lock screen wallpaper and home screen wallpaper around since iOS4)
- live apps
(windows exclusive but iOS has the badge and notification tray for quick access to whats happening in the app)
- app recommendations in store based on what friends use.
(genius is similar and shows you apps based on what you installed and are looking at on the app store)
- try before you buy apps.
(App Store on iOS invented this 90% apps have a lite version to "try before you buy")
- consistent format/theme/layout of apps.
(why would you want that it would look so monotonous plus it would really limit the app choices not to mention there are thousands of app devs and apple does not control their creativity)
- group chat rooms to share calendars, photos, documents and chat updates built right into the the contact list (compatible with users with iOS)
(iMessage released in iOS 5 last year already does this)
- intelligent word flow keyboard for fast typing.
(Apple is working on this and can be enabled by moding a plist file on a jailbroken phone its baken into the firmware just not enabled yet just like the pano camera was around since iOS4 but disabled in the plist file controlling it)
- access restriction for children.
been around since iOS3 (long before windows phone 7 or 8 was announced)
- compatible with iTunes and WMP.
(already compatible with iTunes and WHY would Apple make it compatible with POS software like WMP)
- photo editing apps built into the standard camera app
(limited photo editing already in the camera app since iOS 5, Cropping, straighten/rotate red eye removal and auto enhance)
.