You really can't compare a screenshot from an online sim to a rendering done with a 3D modeling software.
Those pics took 1-3 minutes to render, each. Only one plane in view, no other objects. That would give a framerate of 0.02-0.006 frames per second. Now add in other planes, ground and gaming tasks that CPU has to do. Playable ?
Who knows, maybe in 10 years from now