Arma 3 is a very good game so far in Alpha, I have enjoyed it a lot. Please make the interface more user friendly and this game will surely be one of the best.
The market for ultra realistic military simulators has always been there, but no one has ever made one that featured a easy to use interface along with the gameplay.
Much was the success of Call of Duty series. Once the game's control and interface became easy to play. It became very popular. Many new players get turned off games because the controls may be too complex or difficult for them to learn and get use to.