It gives us a look at the better character, environmental and visual effects, including beautification passes, skin rendering, enhanced/ remade textures, more detailed 3D models, eye shaders, re-lit cutscenes, and global post-effects such as tone mapping, volumetrics, depth of field, ambient occlusion, and subsurface scattering.
Mass Effect: Legendary Edition has gotten a new comparison trailer with a month to release date, which showcases how the upcoming remastered version improves on the original Mass Effect trilogy of games.