When Nintendo first spilled more details on the Switch at it's January Presentation 2 years ago, they described it's hardware as all of Nintendo's previous systems rolled into one. The Famicom's two controllers and suite of peripherals, Game Boy's portability, SNES' diamond buttons and shoulder buttons, N64's analog stick, rumble, and built-in 4 player support, GameCube's handle and Game Boy Player, DS' touch screen and wireless features, Wii's motion controls, and Wii U GamePad's off-tv concept.
Looking at the Switch hardware, you can definitely see different parts of Nintendo's past littered throughout its design, even from their pre-gaming products. From what we've seen so far however, I feel like this philosophy can also be applied to the entire first party library of the Switch. Nintendo's software lineup at the moment really does feel like the best parts of Nintendo's different eras on one console. The side-scrollers of the NES and Game Boy, the creative new IP, genre diversity, and polish of the SNES, the ambition and multiplayer focus of the N64, the risk-taking of the GameCube, the casual games, unique controls, and user-friendliness of the DS and Wii, and the ports and DLC of the 3DS and Wii U era. And that's just the first 2 years of the system. If this is what Nintendo can do in that time, then it bodes well for the future of the Switch, especially now with only one main platform to support.
I feel like the Switch first party wise, could possibly be Nintendo's Ultimate era. Taking all the best parts of the past, and refining them to a T.