NES - The original

SNES - Changed the controller

N64 - Changed the controller

Gamecube - Changed the controller, moved to discs

Wii - Changed the controller, added motion controls

WiiU - Changed the controller, added screen to controller with 'console' kept as a separate box

Switch - Integrated the screen and the console into one form factor

Meanwhile, look at the XBOX platform. After going to the 360 controller, the form factor of 'standard' gamepad + separate console box has been the same for 3 generations now without any significant changes other than more powerful hardware. The Kinect was an attempt to encroach on Nintendo's motion-controls turf but it, like the Playstation Move, withered on the vine when first party products intended for them turned out to be turds.