We got an awesome look at Metroid Prime 4 in the direct but something more interesting for me was the virtual game cards.
So essentially you could be:
- At a friends house with 2 Switch's on the same WiFi
- Friend A can share a game with Friend B like it's a cartridge even if the game was bought from the Nintendo eShop
- Friend B has 14 days to play the game
This does open up a decent amount of flexibility with sharing games.