At Macworld/iWorld this afternoon, one company was demonstrating an archery-based iPhone accessory, the BowBlade, which was inspired by movies like The Hunger Games.
The BowBlade is designed to look and feel like a traditional bow and arrow with one caveat - there's an iPhone attached. The iPhone goes at the front of the device, the bow is extended, and a trigger at the back fires a shot. When the trigger is fired, a stylus tip touches the screen.
Various games incorporate extra features like the iPhone's camera and augmented reality to create real world targets, or the iPhone's gyroscope and accelerometer for aiming and firing. Our sister site TouchArcade has a video of the BowBlade in action:
The four pound version of the BowBlade being demonstrated at Macworld was a prototype, but the company has pre-orders available for $185. Shipping will begin in April.