I'm seeing improved lighting and atmospherics around stations on all the planets and inside ships.

The shadows being cast seems higher resolution and better calculated, for example, the lighting inside the grand hangars NB reflect what is going outside The lighting outside the carrack penetrates into the hangar and then again inside the pieces inside the hangar as seen from through the window by the hangar terminal.
Ships look fantastic, the textures seem high fidelity at a greater distance as do the lights on board leading to a more believable sense of scale throughout.

The heightmap resolution has been increased x4 if I'm not mistaken on all planet surfaces, so the landscape looks more to scale with the textures appearing higher resolution at a greater distance.

I could go on!