A smoother framerate is always preferred, but again folks, you can't judge the next gen systems by cross gen games (regardless of how great they look)
THIS IS WHAT NEXT GEN LOOKS LIKE THUS FAR
All of these look much better than most eighth generation titles due to-
Lighting
particles
Shadows
loading
far higher CPU allowing for more on screen
Far higher GPU allowing for more fur, textures, shaders higher poly models etc
and these are all early Next Gen Only titles...
Games like Forspoken, Gran Turismo 7, Project Eve, etc will all only get better looking in time.