Also, if you have AirDisplay and a new Retina iPad, you can run the iPad as a HiDPI monitor. It'll be a little laggy, though, which probably won't be the case

Also, if you have AirDisplay and a new Retina iPad, you can run the iPad as a HiDPI monitor. It'll be a little laggy, though, which probably won't be the case with a non-WiFi connection.