Following on from its use in Pokémon X & Y, using the Internet, you have the ability to download special announcements for Pokémon Omega Ruby & Alpha Sapphire. These announcements can be manually downloaded, or downloaded via SpotPass, the automatic download feature of the Nintendo 3DS. In addition to that, if you are nearby a special event, you can download special announcements and events there, through the Holo Caster. Many of these announcements are downloadable only for a limited time, due to the fact that the topic they pertain to is often time sensitive.
When you view these announcements, the game utilises the 3DS's cameras to create a 3D overlay, furthering the idea of it being a holographic broadcaster.