taken directly from:
Submitted by Scott Davert on 19 September 2012
As with the previous release of a major iOS upgrade (from version 4 to
5), there are many enhancements to iOS 6 not directly related to
accessibility. In this release, they include FaceTime over cellular
networks, a redesigned App Store, a revamped settings menu, direct
Facebook integration, a do not disturb feature—among many others.
Please see the link at the end of this article for a list from Apple
about changes not directly related to accessibility. To list and
discuss all new features which do not pertain to accessibility is
beyond the scope of this article. Rather, this is to specifically
focus on changes with respect to the different options available from
an accessibility standpoint.