They did not experiment with the CD, they commissioned it to Sony first and then Philipps and broke the contract with Sony suddenly and that's why Sony decided to make a game console by themselves under the help of Kutaragi. Yet they never released anything for the SNES in terms of CD drive, while Sega did have the MegaCD or SegaCD way before them.
Analog sticks ? Didn't Sega had the Nights controller with analog sticks around the same period, for the Saturn ?
Four ports... wow, that's innovation ! You mean, everyone else could do it with a peripheral, but because Nintendo suddenly integrates 4 ports on the console, they "invented it" ? You had 4 ports extensions for about every 16 bit console out there to play Bomberman, already. Nothing new, really.
Four way split screens ? Guess you never heard of Hired Guns? Yeah you can argue that was not real-time 3D, yet that was already four way, multiplayer split screen in the very early 90s. Way before the N64.
Seriously, consoles ALMOST did not invent anything, and if they did, it's usually Sega who was at the helm of innovation most of the time - they released a 16 bits 2 years before Nintendo did. They released a 32 bits 2 years before Nintendo did, etc...