Supports multiple deployment targets (Android, iOS and more)
Technology is fairly accessible (HTML, Javascript, Angular 2)
Should be future proof (as much as anything can be), while also support older systems (again, as much as anything can or should be). Made particularly possible by Angular 2 being finalized.
Performance is not a mission critical factor, the kinds of things we are doing are well suited for ionic/cordova applications; and anything which may not be can be written as a native plugin
Ionic provides tools above and beyond cordova which accelerates development and adds a proportionate amount of hipstertude
Options:
HTML / Javascript / CSS
Native
Other