Bohemia Interactive's ArmA III is out later this year, and while for many the series' super hardcore simulation slant is off-putting, for me it's just about the perfect implementation of a military shooter. Or tank sim. Or jet combat game. Or truck driving simulator.
While the finished game isn't out for another few months, an alpha has been running for a while now, which has just transitioned into a beta. This video, actually put together by a member of the series' most dedicated fan group (ShackTactical), gives us a nice rundown of all the improvements that have been made to the game since people got their hands on it, and gives a breakdown of what the ArmA series actually is.