Mac Rumors posted a news story that the new Apple TV can be mounted and restored in iTunes

This means that the jailbreak community may soon be able to offer us tools, as they currently do for other iOS devices, to save SHSH blobs, jailbreak the Apple TV, and install 3rd party software. Maybe an app store for Apple TV may come sooner than any of us may have expected after all.

  Jailbreaking of New Apple TV Eased by iTunes Restore Capabilities