It now appears to be confirmed that the Shatter exploit which is due for a public release soon and would jailbreak all iOS 4.1 devices has been found to function on the latest Apple TV as well which is known to be running iOS4.1 as confirmed by @chpwn.
It’s looking like SHAtter is going to be the gift that keeps on giving. Even though the new AppleTV isn’t yet in people’s homes, the firmware is available on Apple’s normal public distribution servers and SHAtter has been used to decrypt its keys! The main filesystem (“Mojave8M89.K66OS”) key for 018-8609-066.dmg is:
MuscleNerd the well-known iDevices hacker, also mentioned that if you are interested in the potential Apple TV jailbreak, so it’s better to buy it early before Apple patches the discovered exploits. New jailbreak tools still in the procees and when it will be release for public use we will definitely update you with it, so stay tuned!