iOS has drawn a lot of attention (and rightfully so) for making sure it’s accessible to anyone, no matter how they are able to use it. However, these accessibility features can be usable for everyone. There’s a lot of hidden functionality in these features, already included in the OS that you just installed.
Good little article on how accessibility features can be helpful to users without disabilities. It’s cases like these which may serve as additional incentive for other mainstream companies to invest in universal access.