For example: Let's say you're playing game X on another platform (PC, Xbox, PS) but you also have said game on the Switch. It would be great if you could continue game X on the Switch right where you left off without having to having to start the game from the very beginning, also you could play your game anywhere.
This is all hypothetical (obviously). I just wanted to see what you guys think.
Feel free to correct me if I've made any mistakes.
EDIT: Of course, you'll be able to this with all of the Switch games.
Discussion started at here by GA_Gonzalez