Apple is set to unveil a software update for Apple TV that brings the version up to 3.0 and includes recent iTunes additions like iTunes LP and iTunes Extras. The news emerged after iTunes users were asked to agree to a new set of iTunes Store T&Cs.
A paragraph has been added to those T&Cs that reads: "iTunes LP and iTunes Extras Products are usable only on computers with iTunes 9 or higher and Apple TV with software version 3.0 or higher.
iTunes LP refers to the bonus content recently unveiled for certain major label albums. That content can include lyrics, liner notes, photos, videos and other bonus material. iTunes extras refers to a similar sort of thing but for video content, like DVD extras.