Air Display lets you position your iPad next to your computer, drag windows onto it, and interact with those windows as you would on any other computer display.
Air Display's performance is extremely responsive, employing a clever dynamic compression algorithm. On a typical Wi-Fi network, mouse cursor refreshes are indistinguishable from a wired mouse.
Air Display works in both landscape and portrait configurations. Just rotate your screen, and it automatically reconfigures.
Air Display makes a laptop much more useful. Adding the iPad's 1024×768 display nearly doubles the screen area of a netbook or laptop.