I see a lot of people talking about the Switch like it was just a novelty concept. Stop thinking about the Switch in the same way as the Wii.
The reason Switch was successful is not because it was the first to fully implement the hybrid concept, but because they actually did it well, providing a consistent output of high quality games which made the Switch as a product not just convenient but also incredibly well supported with variety of software.
Switch 2 being a successor to that doesn't lower it's potential, but instead creates a chance to build on everything Nintendo learned, since the foundation of this product isn't built on any short-lived gimmicks but rather an incredibly practical service that only Nintendo have perfected so far.