Some more details (interviews) from the devs: http://thegamershub.co.uk/2010/03/hubcast-05/ and http://www.massively.com/2010/03/22/interview-with-world-of-tanks-mike-zhivets/

Wargaming.net company (Order of War, Massive Assault) has announced a new on-line action World of Tanks. The game depicts a combination of such genres as the third person action, FPS, RTS, RPG, and the simulator. The gamer will get highly detailed tank models, hardcore battles, and, most importantly, the atmosphere of shoulder-to-shoulder fights with brothers-in-arms against a well-organized enemy. Found here: http://www.worldoftanks.com/