This stuff is overrated. All Sony did was take the Super NES, pay off third parties, and market it better while letting Sega imploded onto itself.
The NES, SNES, N64 really didn't have a "gimmick", they were just straight forward successors of each other, with the N64 they just made the huge mistake of not using CD-ROM.
The N64's gimmick was its 3D hardware and analog controller. NES had a shit ton of gimmicks ROB and the Zapper. Even the SNES was designed around Mode 7 and a large color pallet. What I'm saying is that Nintendo typically has a unique mission for each of its platforms.