This particular update doesn't just allow more people into the beta; it also adds new tanks to the game. United States and German tanks of tiers VII and VIII have been added to the game, increasing the firepower on all sides of the playerbase. No word yet on an official release, but the easiest way to speed it along is by logging in and testing to provide plenty of data on the console version's performance.
[Source: Wargaming.net press release]
World of Tanks Xbox 360 edition