One of the big draws of Nintendo’s new Wii U console is the fact it can stream games to a controller and also use that controller as a secondary screen. While Wii U won’t be out until 2012, though, this iPad game can do it a lot sooner.
https://lastchance.cc/everything-we-know-about-nintendos-brand-new-console-w-5809686%3C/a%3E%3C/p%3E
You’ll need something that supports Apple’s AirPlay feature, and will have to wait until iOS 5 is released, but once those two things are in the can you can use the iPad as both a controller and an augmented display.