Of course it looks better than DCS, especially the terrain. It has to look good while walking around, which is overkill from the air. Not to mention arma3's very nice lighting engine and satellite terrain (terrain textures actually look better from the air). If it looked like DCS it would be butt ugly on the ground (just thinking of DCS combined arms screenshots... *shudder*).
Cockpit pic, it's not as detailed or clickable, it's an infantry/combined arms sim.