Ionic 2.2.0 introduces significant updates, including bug fixes, support for Angular 2.4.8, and the highly anticipated Split Pane component, which enhances app responsiveness on larger screens by allowing two views. Unlike its predecessor in Ionic 1.x, the new Split Pane is more versatile, not limited to menus, and can be implemented by simply wrapping the root component with specific attributes, such as the "main" attribute for designating primary content. The Split Pane is automatically responsive, hiding until the viewport reaches a customizable breakpoint, and supports nested navigation for complex app development. This update marks a pivotal advancement for apps designed for larger devices like tablets and desktops, with further desktop support improvements underway.