Nintendo will keep the Switch exactly as it is for the next year.
Anyone who has purchased a launch day Xbox of the PlayStation game console that will be replaced with a slimmer, quieter, less power hungry version eventually. Sony did it with the PS2, which became the PS2 Slim, then repeated the exercise with the PS3 and PS4. The Xbox 360 and Xbox One also received hardware refreshes.
Nintendo on the other hand, enjoys refreshing its handheld hardware, but not so much its home consoles. The 3DS has gone through six refreshes, with the current (and best) model being the New Nintendo 2DS XL. As the Wall Street Journal reports, Nintendo isn 't thinking about changing the Switch hardware at all in the short term. Two days from now The Switch Hardware will celebrate its 1st anniversary and all the signals coming out of Nintendo. to focus on peripherals for it. The first and most high-profile of those peripherals is Nintendo Labo, which will be sold as a range of DIY interactive cardboard toys. Nintendo could continue to release new kits carrying the Labo name for years to come. Other peripherals are thought to be in the works that attach via the USB Type-C port and / or include network-related features.
While the Switch will not change on the outside, it may do so internally. If Nintendo can reduce the cost of manufacturing. A revised Switch with a bigger or smaller screen, better battery life, and more internal storage will appear eventually, but it looks to be years away for now.