That snazzy AirPlay Mirroring feature Apple showed off at WWDC earlier this year is back for an encore, and now it’s strutting its stuff on the iPhone 4S. Previously we saw AirPlay piping an iPad 2 to the big screen by way of Apple TV, but the upcoming iOS 5 features seems to have broadened it horizons — letting Apple handsets get in on the HDTV mirroring love. AirPlay not your thing? Don’t worry, you can still score high-def mirroring action using a wired dongle. Skip on past the break for a peek at the accessory that will make your next $2,000 Halloween costume that much easier to build.