In a similar way to the traditional computer workstation or laptop, iPad content can also be displayed on a classroom or auditorium computer projector. However the significant advantage is that this can be done utilizing the campus WiFi, so that the presenter is not constrained to a specific location in the room and can take full advantage of the iPad’s mobile form factor. This can similarly be done for other iOS devices.
The brief screencast video below (1 min 58 sec) shows how this can be easily done with the correct device setup. Click the icon on the far-right of the video navigation bar for full-size view. Note that the video is only accessible on campus.