The new Apple TV will not be the only device that can be used with AirPlay.
Apple demonstrated their new wireless media protocol AirPlay at the September 1 media event. With AirPlay you can for instance watch videos stored on an iPad instantly and without wires on an Apple TV connected HDTV.
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Now iHome is teasing a Wireless Speaker that is compatible with Apple's Airplay. The new iHome AirPlay device will ship this Holiday Season.
The AirPlay support for the iPad, iPhone and iPod touch comes with the iOS 4.2 release in November.
I expect many more devices to appear that wil support Apple AirPlay this Holidays.