World of Tanks doesn't offer you a high enough volume of tanks? Have you found yourself driving around in a tank shooting at other tanks whilst thinking, "I guess there are tanks here, but not really a whole world of them?" Then maybe what you were really waiting for was the newest update to the game, update 8.8, which adds a branch of Soviet medium tanks for tiers 6 through 8. There are also significant changes to the German tech tree to enhance and reclassify several tanks.
Wait, did you want an update to World of Tanks that was not quite so tank-focused? Well, the new update will also include a new battlefield arena, Tundra, so you can see tanks shoot one another somewhere new. The update is due for release on September 11th in Europe and September 12th in the US, but you can get a small preview from the video just past the cut. (Here's a hint: tanks shoot each other.)
[Update: Update 8.8 has been pushed to North American release on September 18.]
[Source: Wargaming.net press release]