We took one of the Apple TVs** over to my folks to show pics from a recent trip (to Universal Studios).
Plugged it in, the iPad saw it under AirPlay, select and photos on the TV! Very convenient mobile video share/broadcasting solution vs. having to lug an additional piece of equipment. I didnt even need the AppleTV remote (which we left one time, pretty much rendering it worthless since you cant Remote if you cant setup the WiFi).
I used to occasionally use an active tether from one of our iPhones to create a network which was an _OK_ solution, though it required the remote, plus you have to restore settings.
Side note: I dont recall AirPlay supporting image zooming/panning when using the AppleTV which was a pain, particularly with portrait oriented images.
** Rev A model 1469