Support for Virtual Game Cards and Data Migration to Switch 2 in Nintendo Switch Software Update.

Nintendo has rolled out software update version 20.0.0 for the Nintendo Switch, introducing new features and support for those eyeing the Switch 2. Here’s the breakdown:

The Virtual Game Card allows for seamless game transfers from one digital purchase to another device.
GameShare enables the original Switch to play games shared from the Switch 2 without needing to own the game.
Data Migration to Switch 2 adds the functionality to seamlessly transfer data from the original Switch to the Switch 2, either locally or by storing data in the cloud. If selling the original Switch, data stored in the cloud will be reset immediately.

Source: Nintendo Life

TLDR: Nintendo Switch update 20.0.0 adds Virtual Game Card, GameShare, and Data Migration to support the upcoming Switch 2.