When iOS 4.3 launches, you will also be able to utilize Home Sharing from any iPhone, iPad, or iPod touch. Home Sharing is a service that has been available between Macs for quite some time now. The Apple TV also supports it.
Some users may be wondering what Home Sharing is or how it may benefit them. In the simplest terms, Home Sharing is almost the opposite of services like AirPlay. Instead of pushing content from your iOS device to a television or other device, it will allow you to pull content from your computer to your device. Anyone who has an Apple TV should already be familiar with how this works. You simply pair your iTunes library with your Home Sharing compatible device and whenever iTunes is running, the device will be able to access your iTunes library.
For those of you who prefer watching movies on your iPad or other iOS device when at home, this may be ideal. I know this will be a service I'll take advantage of when someone else in the house is hogging the television. I can simply stream any of my iTunes content from my iTunes library to my iPhone, iPad, or iPod Touch. Anyone else think they'll utilize this feature quite often?