This will be handy to know with Beta 14 when Angular 1.3 support is added to Ionic. 
“In my previous post Angular 1.3.0 Improved Accessibility with ngAria I covered a new module in Angular called ngAria that assisted Angular developers by automatically adding in aria-* attributes where appropriate, which is great for accessibility. With Angular 1.3.2, that module was updated to add aria-live attributes to any element marked with the attribute ng-messages.”