There are a few good things about Arma Reforger.
1: The time on your watch matches the time on a wall clock.
2: You can vault over fences and jump for once.
3: You hold the physical watch in your hand instead of appearing on the screen’s side. it should be on your wrist though.
4: There are animations for getting in and out of vehicles. Plus you open the door to get in.
5: Rendering the terrain in the distance seems a little better than Arma 3.
6: You can use the manual transmission in vehicles and have more control over the speed.
7: It is possible to use weapon inspection. Plus you may remove a magazine from a weapon and still have a round in the chamber.