Seeing those ads was a bit weird as I've never seen them before. It is true that the SMS had 3D games which would technically be better graphically than any NES games, even the few NES games that had 3D didn't use the same type of 3D.
The SMS really is a good example of why we can go back to or outright prefer classic games over whatever current games are out on the latest hardware available. Gameplay is far more important than pure technical specifications.
That said I still prefer SMS games to the N64 or Dreamcast.