The game has introduced some new Guns and Tanks and Aircraft on both sides of the effort. From what i've seen, they make a nice new edition! Theres also a Beta being run dealing with a more realistic method of supply. It will soon be possible to chose how much fuel you have (supplystockpiles) and also have an engineer refuel a tank. Much much more too, to make the game more realistic!
Did i forget to mention Mortars? Thats another unit that they're adding. Infantry have to mark coordinates for the Mortars to fire on. There are already Paratroopers etc. So the upcoming updates are going to be pretty awesome.