Exactly - and what can add more realism to a tank sim than the attempt to reproduce the claustrophobic restrained interior of a battletank with all its restrictions regarding overview, all-round visibility and restrained field of view?
Don´t get me wrong: gfx of this sim are stunnig and I really appreciate all that eyecandy but for me the most fascinating aspect of a sim is the reproduction of a system let it be a car, airplane or tank as realistic and exact as possible. So reproducing the interior of a tank is not just self purpose but a design tool which makes the whole thing believeable.