While there is a new Apple TV on the way, it won't arrive next week. Instead, expect an update to the Apple TV software, according to a new report on All Things D.
Apple will be releasing a new version of iOS - iOS 7 - next week, and the Apple TV runs iOS, so this stands to reason. According to Peter Kafka, new features in the update will allow you to play your iTunes content on your friends' Apple TVs without having to sign out and sign in using your own Apple ID (instead, using AirPlay on your own device). You'll also be able to play Apple's soon to be released iTunes Radio.